Contextual effects on students’ achievement and academic self-concept in the Nordic and Chinese educational systems
Large-scale Assessments in Education volume 10, Article number: 16 (2022)
The current study investigates school contextual effects on students’ academic self-concept and achievement, that is, peer socioeconomic effect and big-fish-little-pond effect (BFLPE), in four Nordic education systems (i.e., Denmark, Finland, Norway and Sweden) and selected Chinese education systems (Hong Kong and Beijing-Shanghai-Jiangsu-Zhejiang). The two school contextual effects are studied simultaneously to negate the confounding effects of student and school socioeconomic status (SES), academic self-concept and academic achievement. The study focuses on the following research questions:
Are there differences in the between-school variation in school SES composition, academic self-concept and reading literacy across the Nordic and selected Chinese education systems?
What are the sizes of peer SES and BFLPE in the Nordic and Chinese education systems?
Are there any differences that can be observed between the 2000 and 2018 data for the Programme for International Student Assessment (PISA) in the first two questions for Denmark, Finland, Norway and Sweden and Hong Kong?
Using PISA 2000 and 2018 data from Denmark, Finland, Norway, Sweden, Hong Kong and Beijing-Shanghai-Jiangsu-Zhejiang (in 2018 only), a multiple-group two-level structural equation modelling was applied to estimate the school contextual effect.
The current study indicated that school academic and socioeconomic segregation intensified over the two decades in most of the studied countries. This finding lays the groundwork for understanding the two schools’ contextual effects. School SES compositions positively affected students’ academic achievement, while average school achievement negatively affected students’ academic self-concept. Given that students’ academic and socioeconomic composition has become more homogeneous within schools, the contextual effects were more pronounced. However, variations across diverse education systems were also notable.
The current study adds evidence of the school contextual effects regarding the peer SES effects and robustness of the BFLPE, considering the nested structure of the data and diverse cultural milieu. We argue that these diversities reflect the varying extent to which educational reforms were introduced in different countries, here as oriented to marketisation, privatisation and choice. These reform actions have changed the composition of students at schools and school culture, which moulds individual students’ cognitive and noncognitive development.
The peer composition of the learning environment is undeniably influential for students’ academic achievement and development (e.g., van Ewijk & Sleegers, 2010a, 2010b; Wang et al., 2020; Zhang, 2021). These effects of peer characteristics were described as ‘peer group effect’ (Evans et al., 1992; Hoxby, 2000; Yeung & Nguyen-Hoang, 2016), ‘compositional effect’ (Liu et al., 2015; Van Damme et al., 2002), ‘contextual effect’ (Raudenbush et al., 1992; Willms, 2010) or ‘aggregated group-level effect’ (Hutchison, 2003; Marsh et al., 2012). There are indeed differences between these terms. However, the fundamental principle emphasises that a student body’s collective properties affect students’ cognitive and noncognitive outcomes over and above their own characteristics (e.g., Harker & Tymms, 2004; Willms, 2010). Depending on the outcomes and contextual characteristics in focus, the contextual effects are defined differently; for example, the peer SES effect or the big-fish-little-pond effect (BFLPE). The former is the effect of peer socioeconomic status (SES) composition on students’ school performance (e.g., van Ewijk & Sleegers, 2010a). The latter is described as the effect of average school achievement level on academic self-concept (for a review, see Fang et al., 2018; Marsh & Craven, 2006). The peer SES effect and BFLPE may confound and intertwine, requiring that the two contextual effects be studied simultaneously, even though they have been predominantly investigated separately across the adjacent fields of psychology and education. In the present study, we attempt to place the two phenomena into a dialogue and investigate the school contextual effects on students’ academic self-concept and achievement across the Nordic and selected Chinese metropolitans. Two dominant reasons steer the choice of very different geographical locations: first, the diversity of educational traditions and institutional reforms over the past two decades taking place across these regions (e.g., Frønes et al., 2020; Blossing et al., 2014; Liu et al., 2019) and, second, the diversity in achievement levels in the Chinese subpopulations (i.e., respective benchmarking participants) and Finland versus the other Nordic countries, as indicated by the international large-scale assessments (ILSAs).
Programme for International Student Assessment (PISA) data for the years 2000 and 2018 from the Nordic and selected Chinese education systemsFootnote 1 were analysed using multigroup, two-level structural equation modelling. As a rule, contextual studies can evaluate whether group-level characteristics (e.g., school SES and/or achievement composition) contribute to individual’s cognitive (e.g., student academic achievement) and noncognitive (e.g., student’s self-concept) outcomes, beyond what can be explained by the students’ own characteristics (e.g., family SES and ability level). Therefore, the current analysis estimated the size of the two contextual effects: the peer SES effect and BFLPE.
The peer SES effects on students’ learning
Numerous studies have examined the associations between the peer effect of SES and academic performance (e.g., Van Ewijk & Sleegers, 2010a; Yeung & Nguyen-Hoang, 2016). These studies have found, on average, a positive peer SES influence, indicating that students who attend a school with a higher SES composition than their own will achieve higher academic outcomes (e.g., Ammermueller & Pischke, 2009). However, the size of the estimates varies extensively, ranging from nonsignificant to moderately large (e.g., Sacerdote, 2011, 2014). The results of the meta-analysis conducted by Van Ewijk and Sleegers (2010a) revealed that the SES compositional effect was strongly related to SES’s operationalisation and the choice of the analytical model applied (see also Angrist, 2014).
Manski (1993) identified three types of peer effects: endogenous, exogenous and correlated. Endogenous effects refer to the students’ behaviours or outcomes that are affected by the behaviours or outcomes of the peer group (e.g., Yeung & Nguyen-Hoang, 2016). Exogenous effects are related to the influences of group compositional or contextual features on outcomes, such as SES and ethnicity (e.g., Van Ewijk & Sleegers, ). Correlated effects refer to students being selected to the same group tend to have a similar achievement level because they share similar individual characteristics and the same learning environment. Different models have been proposed for these three peer effects to estimate their effect size (Manski, 1993).
Focusing on the endogenous peer effect, Yeung and Nguyen-Hoang (2016) summarised the results of 53 studies that were carried out from 1980 to 2014 on endogenous peer effects in education; they found a highly significant peer effect on an individual’s school outcome. However, the effect size was relatively small (e.g., Sund, 2009). They also noticed that the endogenous peer effect, as moderated by the educational outcome of a school subject, the choice of peer group, and publication status of a study, had moderating effects on endogenous peer effects. Hence, it may be that the extensive control for confounding covariates can lead to underestimation of the peer SES effect (e.g., Van Ewijk & Sleegers, 2010a; see also Boucher et al., 2014; Burke & Sass, 2013) because the assignment of students in schools and classrooms is unlikely to be random (i.e., because of residential segregation, school choice and self-selection mechanism), even for school systems with a proximity recruitment principle and no tracking. The current study focuses on the exogenous peer effect of SES.
Again, previous studies have shown no consensus on the effect size for these peer SES effects. For example, Hoxby (2000) used random within-school variations across cohorts to account for selection bias. The peer measures in Hoxby’s study were the gender and race composition of the classroom and performance by opposite gender and race group. The study found relatively strong peer effects (for more details, see Hanushek et al., 2003; Hanushek et al., 2009). Ammermueller and Pischke (2009) studied peer effects in six European countries with 2001 data from the Progress in International Reading Literacy Study. By focusing on the within-school variation between classes, they estimated the effect of a peer’s sociodemographic composition (i.e., number of books at home, gender, age, ethnicity and background) on an individual’s reading achievement. The authors applied a fixed effect model and instrumental variable approach to account for the selection bias and reflection problem,Footnote 2 finding a moderately large peer effect of about 0.17.
In their meta-analysis of the exogenous peer effect of SES, van Ewijk and Sleegers (2010a) argued that there were more negligible effects if SES was dichotomously measured (e.g., free lunch eligibility) or composition was measured at the cohort/school level (see also Gustafsson & Yang Hansen, 2018). In general, the meta-analysis found a considerable average weighted effect size of all the studies included, with ‘an increase of the average socioeconomic status of a student’s peer group with one student-level standard deviation leading to an increase of test score with 0.320 SD (p. 143; van Ewijk & Sleegers, 2010a). However, the peer effect the researchers have found highly depends on the analytical approach taken. The study also pointed out that omitted covariates may overestimate the peer SES effect. Moreover, prior meta-analytic studies found the effect of compositional SES on students’ achievement to be over and above the effects at the individual level (e.g., Hattie, 2008; Sirin, 2005).
In addition, as a crucial contextual determinant of academic performance, peer SES positively influences the student’s academic self-concept (e.g., Chiu & Chow, 2015; Marsh, 1984; Tucker-Drob & Harden, 2012). Observing fourth-grade students’ reading achievements in 33 countries, Chiu and Chow (2015) showed that classmates’ family factors (i.e., parent SES or home educational resources) were more strongly related to an individual student’s reading achievement than to classmates’ characteristics (e.g., attitudes towards reading). Among the examined predictors, classmates’ home education resources were the third strongest link to a student’s reading achievement. Tucker-Drob and Harden (2012) reported similar relations in observing gene-by-environment interactions and mathematics achievement. However, past research has seldom focused on the school peer SES effects on academic self-concept (Marsh, 1984), let alone using Western and Eastern countries for comparison (Chiu & Chow, 2015). Instead, in the latter case, only the overall patterns have been observed, reporting differences between wealthier and more collectivist countries against those that were not.
Unfolding the big-fish-little-pond effect (BFLPE)
Academic self-concept (ASC), here referring to an individual’s general perceptions of academic abilities, may refer to the general academic domain and/or particular subject matter (e.g., mathematics, English, science). Both have been an object of research since the 1970s (Marsh & Shavelson, 1985; Shavelson et al., 1976). Extensive research has shown that academic self-concept is not only an essential factor in determining students’ academic achievement (Bong & Skaalvik, 2003; Fang et al., 2018; Hoferichter et al., 2018; Marsh, 1984; Marsh et al., 1988), but it is also closely associated with other behavioural and emotional outcomes—academic self-esteem, motivation and anxiety (Bong & Clark, 1999; Marsh & Martin, 2011).
One of the most influential theories on ASC in educational psychology might be the BFLPE (Hoferichter et al., 2018), which was proposed by Marsh and Parker (1984). The concept is based on a social comparison process and frame of reference theory (for a detailed account of the BFLPE’s theoretical background, see Craven et al., 2000). The BFLPE refers to the phenomenon that equally able students in higher-achieving or selective schools tend to have lower ASC than those in lower-achieving and nonselective schools (Marsh & Parker, 1984). The BFLPE was first detected by Marsh (1984), who showed that students’ ASC was positively influenced by individuals’ achievement and SES but was negatively influenced by school-level achievement and SES. Marsh (1984) also argued that how students perceived their ASC was related to whether they compared themselves with their peers in class or school. Since then, BFLPE has been investigated by researchers worldwide (e.g., Fang et al., 2018; Marsh, 1990, 1991; Marsh & O'Mara, 2008; Marsh & Yeung, 1997). Factors such as students’ subsequent course selection (Marsh & Yeung, 1997), test anxiety and educational attainment (Marsh & O'Mara, 2008) and social comparison (Marsh et al., 2008a, b) were explored and found to be associated with the BFLPE.
The BFLPE is considered a powerful, long-lasting contextual effect that generalises across different research sites, levels of education, and cultures around the world (2008b, 2021; Fang et al., 2018; Marsh et al., 2008a). An example of its long-lasting effect can be found in Marsh et al.’s (2001) study focusing on BFLPE before and after reunification in Germany. The BFLPE was found among students in East and West Germany and primarily disappeared by the end of the first postreunification school year. Among the arguments presented, the study argued that the formation of ASC was strongly influenced by changes in school policy (Marsh et al., 2001). The BFLPE has also been investigated across Western, Asian and Middle Eastern Islamic countries. Using data from the Trends in International Mathematics Science Study (TIMSS), researchers have found that ASC was positively affected by individual achievement but negatively by class-average achievement and that such results were generalisable across 13 diverse countries and over two cohorts (Marsh et al., 2015). Marsh and Hau (2003) examined BFLPE with an even larger sample from PISA 2000; the study results demonstrated cross-cultural generalisability in the BFLPE across academically selective schools in 26 counties.
The most recent meta-analysis (Fang et al., 2018) reviewed numerous studies within the field and synthesised some interesting results. The researchers investigated several potential moderators, such as student age, comparison target, ASC in different subject domains and students’ location (i.e., country). The results revealed a few interesting points: (1) The BFLPE demonstrated cross-cultural generalizability. (2) Student age was a significant moderator of the BFLPE. (3) The BFLPE can be understood through social comparison theory, indicating that the level of students’ ASC might be lower in higher-ability educational settings because of the unpleasant comparison referring to their peers. (4) The equally able students tended to perceive more positive ASC in a nonselective and less-competitive environment (Fang et al., 2018).
Diverse educational paths and traditions from the Nordic and Far East
A critical facet of the current study lies in its direct focus on comparing the peer SES effect and BFLPE across the four Nordic education systems and Chinese subpopulations (i.e., Beijing-Shanghai-Jiangsu-Zhejiang and Hong Kong). Although the cross-cultural generalizability of the BFLPE has been argued (Fang et al., 2018), coupled with diverse patterns across different cultures reported for the peer socioeconomic effect (Chiu & Chow, 2015), more focused analyses have been lagging.
In the post-World War II period, the Nordic countries introduced an inclusive and comprehensive education model, here with the primary goal of abolishing the class-based society and enabling social mobility (Frønes et al., 2020; Blossing et al., 2014; Telhaug et al., 2006). The newly established education system practised egalitarian philosophy through a smooth transition between the educational levels without tracking students to ensure equal learning opportunities for all (Husén, 1989; Imsen et al., 2017; Lundahl, 2016).
Over time, and especially with the arrival of neoliberal thinking and the economic trends at the time, distinctive differences have appeared among the Nordic systems (Imsen et al., 2017; Volckmar & Wiborg, 2014), and a debate on the sustainability of such systems has followed (Antikainen, 2006).
Although practices have become evidently diverse (Volckmar & Wiborg, 2014), Sweden was at the forefront of going through extensive changes characterised by decentralisation (Blossing & Söderström, 2014) and severe marketisation and privatisation (Lundahl, 2016). In Denmark, the competitive discourse has also taken its toll (Rasmussen & Moos, 2014). In Finland, polarisation between the schools became evident mainly in the unequal distribution of municipality funds and SES composition of the students attending the schools (Ahonen, 2014). In Norway, education policy has resisted the privatisation of the school market (Imsen & Volckmar, 2014) but has not been immune to accountability practices, which have been introduced gradually across the Nordic countries (Imsen et al., 2017; Wallenius et al., 2018; Wollscheid & Opheim, 2016).
Conversely, although the Nordic countries are associated with ‘nature-centeredness, wellbeing, comfort, simplicity and getting it right’ (Liu et al., 2019, p. 3), China is often depicted as ‘an economic superpower said to be torn apart between aspiration and authoritarianism’ (Liu et al., 2019, p. 3), indicating very diverse political and cultural backgrounds. In the ILSAs, the Nordic countries, Finland in particular, have amazed the world with outstanding academic performances, despite relatively shorter school days, much less homework and fewer standardised tests (Liu et al., 2019). Chinese students, on the other hand, have been stereotyped as learning within a competitive environment with excessive working hours, and have also achieved unexpected performances in the ILSAs.Footnote 3
In recent years, educational research has shown growth in the interaction and intersection between the Nordic countries and China (Liu et al., 2019). However, much remains uncertain or unknown. Notably, most BFLPE research has been carried out in various educational systems in European countries (e.g., Germany, France and the UK), East Asian countries (e.g., Hong Kong and Singapore) and the United States (Marsh et al., 2015). Students’ location (i.e., country) has been found to play an essential role in BFLPE. Based on a meta-analysis, Asian students have been found to show the most substantial effect, whereas European students seemed to show a moderate effect regarding BFLPE (Fang et al., 2018). Stankov (2010, p. 559) argued that the influence of the ‘unforgiving’ Confucian culture on Asian students should be considered when being compared with the European regions. The paradoxical phenomenon where Confucian Asians (i.e., Chinese students in this case) are high achievers but hold adverse psychological outcomes (e.g., self-concept and self-efficacy) can perhaps be explained by the cultural impact because the students tend to be more anxious and self-doubting (Stankov, 2010).
The most commonly used analytical approach to the peer SES effect is within the econometric tradition and its use of fixed effect models (e.g., Manski, 1993; Sacerdote, 2011; Sund, 2009), while the BFLPE is viewed through hierarchical linear models with cross-level interaction and random slopes (Marsh et al., 2008a, b). Marsh et al. (2009a, 2009b) argued that the obstacles with these approaches relate to the measurement error of the constructs and sampling error, which attenuate the estimation of the contextual effects. Moreover, the peer SES effect and the BFLPE are often investigated separately—the former in school effectiveness studies and the latter in the more educational psychology-oriented studies. Very seldom is an integration of hierarchical and structural equation model techniques applied in estimating these two effects simultaneously. Such studies show that students’ self-concept is culture dependent—and has been found to be more adverse in the high-achieving Asian countries and Finland, while it is the opposite in other Nordic countries (Leung, 2014). The schools’ institutional and sociodemographic characteristics and intakes are different between the Nordic countries and China (e.g., Frønes et al., 2020; Blossing et al., 2014; Liu et al., 2019).
The current study aims to examine the school contextual effects, that is, peer SES effect and BFLPE, in the Nordic countries (Denmark, Finland, Norway and Sweden) and select Chinese subpopulations (Beijing-Shanghai-Jiangsu-Zhejiang and Hong Kong), unravelling the confounding among student and school SES, academic self-concept and academic achievement. The following research questions are the focus of the present study:
Are there differences in the between-school variation in school SES composition, academic self-concept and reading literacy across the Nordic countries and Chinese subpopulations?
What are the peer SES effect and BFLPE sizes in the Nordic countries and Chinese subpopulations?
Are there differences that can be observed between PISA 2000 and PISA 2018 concerning the first two research questions for Denmark, Finland, Norway and Sweden and Hong Kong?
The current study used PISA 2000 and 2018 data from four Nordic countries (i.e., Denmark, Finland, Norway and Sweden) and selected Chinese educational systems (Hong Kong and Beijing-Shanghai-Jiangsu-Zhejiang). The main subject domain in both cycles was reading literacy. It should be noted that for China, B-S-J-Z participated only in PISA 2018. However, it has been included in the current analysis to validate the observed pattern difference between the Nordic and Chinese regions. Table 1 shows the number of students and schools included in the study. The sample size at both the student and school levels in PISA 2018 was generally more extensive than in PISA 2000, except for Hong Kong.
As shown in Table 1, the number of students sampled in PISA 2000 was somewhat even across the examined countries. However, in PISA 2018, the two Chinese samples differed significantly from the others. Compared with the Nordic countries, B-S-J-Z had about twice as many students as the other countries, while Hong Kong had only about half the size. The Danish student sample was also substantial. Despite the difference in sample sizes, there were sufficient students and schools for conducting a two-level analysis. Overall, 21,857 students from 849 schools from PISA 2000 and 41,777 students from 1,547 schools from PISA 2018 have been included.
The index of economic, social and cultural status (ESCS) can be used to measure family SES. In PISA 2018, the ESCS index was defined as the mean score of three indices: highest parental occupation, parental education and home possessions. The missing values in these indices were imputed.Footnote 4 The imputed indices were standardised to an OECD mean of zero and using the standard deviation as a unit. The ESCS was calculated as the arithmetic means of the imputed and standardised indices (Avvisati, 2020; OECD, 2019). In PISA 2000, the ESCS was based on five components—highest parental occupations, parental education, family wealth, home educational resources, and cultural possessions. The ESCS was an estimated score of the first factor in a principal component model (Adams & Wu, 2002). In the current study, school SES composition was measured as the aggregated individual-level ESCS.
Students’ self-concept was captured differently in the two PISA studies. In PISA 2018, an index of self-concept in reading competence (SCREADCOMP) was used. Three indicators were used to create the SCREADCOMP index: I am a good reader, I am able to understand difficult texts and I read fluently. The reliability of the SCREADCOMP index, as measured by Cronbach’s alpha, was around 0.80, Hong Kong held the lowest value of 0.79. and Sweden the highest at 0.87, with all other education systems being over 0.84. In PISA 2000, students’ self-concept was based on their perception of a general academic level (i.e., academic self-concept, SCACAD). The SCACAD consisted of three indicators: I learn things quickly in most school subjects, I’m good at most school subjects and I do well in tests in most school subjects. Cronbach’s alpha for the SCACAD index ranged between 0.75 in Hong Kong and 0.84 in Finland, with Denmark and Sweden being 0.80 and 0.81, respectively. The responses to all the indicators were given on a 4-point Likert scale with the categories ‘Strongly disagree’ to ‘Strongly agree’. The self-concept indices in both PISA cycles were IRT weighted likelihood estimates, the so-called Warm estimates of the latent traits, here following the scaling procedure in PISA studies (e.g., Adams & Wu, 2003; OECD, 2019). These estimates were unbiased against random sources of errors in the latent constructs. Confirmatory factor analysis, for example, was used in PISA 2000 to validate whether the latent trait estimation may be biased by model misspecification—for example, not unidimensional (e.g., Feuerstahler, 2018). Other psychometric techniques were also applied to ensure the comparability of the estimated latent constructs (for a detailed description for scaling procedures and construct validation, see chapter 17 in Adams & Wu, 2003 and chapter 16 in OECD, 2019).
The main subject domain tested in both PISA cycles was reading. PISA provided several estimated proficiency scores, the so-called plausible values, to represent students’ test achievement (Adams & Wu, 2002; OECD, 2019). The current analysis used all plausible values of reading achievement (i.e., five plausible values for each student in PISA 2000 and 10 in PISA 2018). Mplus estimated the model parameters repeatedly based on each plausible value. The final parameter estimates reported in the study were achieved by averaging the sets of parameter estimates. The variance of the parameter estimates was a combination of the average variance of the parameter variance based on each plausible value and variation of the estimates across all plausible values (e.g., Von Davier et al., 2009). Table 2 presents the descriptive statistics of the variables involved in the analysis from PISA 2000 and PISA 2018.
As shown in Table 2, the students in the Finland, Hong Kong and B-S-J-Z samples achieved higher scores on reading competence but had a lower self-concept related to reading and the general perception of their academic outcomes compared with their Nordic peers. The ESCS level was lower in Hong Kong and B-S-J-Z China, than in other Nordic countries included in the study. Differences within each country can also be observed in the samples between the two PISA cycles, even though one should be cautious about a direct comparison of these observed statistics. Senate weight was used to adjust for unequal sample sizes across these education systems.
The literature has used a wide variety of approaches to identify peer effects (Manski, 1993). The peer SES effect on students’ academic achievement was highly related to the operationalisation and model choice. In a meta-analysis by van Ewijk and Slanger (2010b), it was found that the measurement scale and level of SES mattered for the size of the peer effect. For example, peer effects will be more negligible when SES is measured as a dichotomous variable or at the school level. Moreover, one may overestimate the peer effect without controlling for prior achievement, and extensive control for many covariates may underestimate the effect (e.g., Sund, 2009). The estimated peer SES effect ranged from nonsignificant to strong on the students’ academic achievement (e.g., van Ewijk and Slanger, 2010a).
The current study examines how individual-level relationships are affected by aggregated contextual characteristics. This required simultaneous analysis of the individual and school levels. Moreover, PISA surveys have applied a multistage cluster sampling design to collect data, resulting in a hierarchical data structure, that is, students nested within schools. Using ordinary analytical methods to analyse clustered data would lead to a type I error because of underestimating the standard error and possibly omitting some crucial relationships involving each data level. A two-level structural equation modelling technique decomposed the individual data into between-school and within-school components. The two components ‘can be used to compute a between-groups covariance matrix (i.e., the population covariance matrix of the disaggregated group means) and a within-groups covariance matrix’ (i.e., the population covariance matrix of the individual deviations from the group means; Hox et al., 2017, p. 290). Thus, the within-group covariance matrix has been group-mean centred. Covariates can be introduced to account for the variances in the outcome variables at both levels. This process allows for examining the interrelationships among variables by estimating direct and indirect effects at the respective levels (Hox et al., 2017). The intraclass correlation coefficient (ICC) describes the proportion of the total variance in an outcome variable because of school belongingness. The ICC can also be interpreted as a measure of the homogeneity of the students in the same school. All variables have been standardised before modelling in Mplus (Muthén & Muthén, 1998–2017). Moreover, the number of missing cases was generally very low for each variable across cycles and countries (see Appendix A). Mplus uses all available data to estimate models with a full information maximum likelihood estimator (FIML), assuming that missing data are random.
The peer effect and BFLPE were estimated simultaneously in a two-level SEM model. The model structure is shown in Fig. 1 (see Appendix B for the Mplus model input). At the individual level, the relationship between students’ self-concept in academic/reading competence and their reading achievement was controlled by the students’ ESCS. This relationship has been denoted as c in the path diagram.
The confounding effect of the school composition of students’ ESCS with both average school self-concept and reading achievement was also adjusted. Such confounding effects need to be cancelled out; otherwise, the BFLPE will be overestimated (2008b; Marsh et al., 2008a). Students’ SES effect on their reading achievement has been denoted in Fig. 1 as a. The SES composition of the school has an impact on average school achievement and has been denoted as b. At the school level, d denotes the impact of school average students’ achievement on the school average self-concept of its students.
A contextual effect exists when the between-school regression coefficient differs significantly from the within-school regression coefficient. This hypothesis has been tested by estimating two new parameters: the peer effect b – a and the BFLPE d – c. The two new parameters are specified using ‘Model Constraints’ in Mplus, which allows for testing of the significance of the parameters.
This section describes the ICC estimations and observes the examined peer and BFLP effects for all countries (RQ1 and 2) and cycles studied (RQ3). It should be noted that because self-concept measures differ in the two PISA cycles, a strict comparison over time is not possible.
Intraclass correlation coefficients
The intraclass correlation coefficient captured the between-school differences in the students’ self-concept (i.e., SCACAD in PISA 2000 and SCREADCOMP in PISA 2018), family socioeconomic background and reading achievement measures. Hong Kong and B-S-J-Z China observed a higher variation between different schools than in the Nordic countries (see Table 3). This result indicates a more substantial selection effect in the two Chinese education systems, making the students in the same school considerably similar in terms of student ability level and personal and sociodemographic characteristics.
For reading achievement, almost half of the variation can be because of students attending different schools in Hong Kong PISA 2000 (48%) and B-S-J-Z PISA 2018 (47%), while this was between about 8% and 17% for the Nordic countries in both PISA 2000 and 2018. Among the Nordic countries in PISA 2000, Finland held the lowest ICC (7.8%), while Denmark had the highest (16.6%). The ICC in Norway and Sweden were at the same level, being 7.8% and 9.1%, respectively. In PISA 2018, the ICCs in Denmark and Sweden amounted to 17.4% and 16.5%, respectively, while Finland and Norway remained relatively stable.
In PISA 2000, Hong Kong observed the highest between-school difference in ESCS (23.1%), and the percentage for Nordic countries was around 13%. The between-school difference in ESCS increased in Hong Kong (30.1%), Denmark (20.1%) and Sweden (15%) in PISA 2018, and Finland and Norway held relatively consistent ICCs in ESCS. Here, 45% of the variation in ESCS in B-S-J-Z can be attributed to students attending different schools. ICCs for students’ self-concept, general academic (SCACAD) and reading-specific (SCREADCOMP), are generally small for the Nordic education systems, being around 1–2%, and much higher in Hong Kong and B-S-J-Z in PISA 2018.
Relationship between students’ self-concept, reading achievement and SES (RQ1)
In PISA 2000, the students’ reading achievement was positively related to their academic self-concept. The standardised regression coefficients between students’ general academic self-concept (SCACAD), SES and reading achievement are shown in Table 4. The estimates were evenly high for the Nordic country students, at around 0.40. At the same time, the estimate was much lower for Hong Kong students (0.14). The regression coefficients of students’ family SES on their reading achievement were also significant and positive for all countries, ranging from 0.32 in Denmark to 0.08 in Hong Kong. The small coefficient of students’ family SES on their general academic self-concept (SCACAD) was also observed in all countries, with Norway having the highest effect (0.17) and Hong Kong the lowest (0.05).
School SES composition was strongly related to reading achievement at the school level. Denmark and Sweden had higher regression coefficients (0.82 and 0.84, respectively) than Hong Kong and Norway (0.67 and 0.62, respectively). Finland had the lowest estimate (0.44). The relationship between school reading achievement and school average academic self-concept (SCACAD) was relatively high in Denmark and Finland, at.78 and 0.72, respectively. In contrast, they were not statistically significant in other countries. School SES composition was significantly associated with academic self-concept (SCACAD) only in Hong Kong (0.65) and Norway (0.54).
Peer SES and BFLPE in the Nordic and Chinese education systems (RQ2)
Peer SES effect
School SES contextual effect boosted students’ reading achievement. Peer SES effects were positive, indicating that students’ reading achievement was higher when attending a high SES school. In PISA 2000, Hong Kong held the highest peer effect, 0.84, followed by Denmark (0.51) and Sweden (0.49). A nonsignificant peer effect was observed in Finland.
Table 6 shows that a significant BFLPE was observed in all countries in the 2000 cycle, except for Denmark. These results align with previous findings (e.g., Fang et al., 2018; Marsh & Hau, 2003). Sweden had the highest BFLP effect in PISA 2000 (− 0.68). When the students attended a school with one standard deviation higher than their own achievement in Sweden in the year 2000, students’ self-concept (SCACAD) was a 0.68 standard deviation lower. Hence, the intensity of the BFLP effect may be related to the students’ intake composition in a school.
Differences across 2000 and 2018 cycles for peer SES and BFLPE effects (RQ3)
Regarding the PISA 2018 cycle results, students’ reading achievement was positively related to their self-concept of reading competence (SCREADCOMP). The regression coefficients were relatively even across the Nordic countries, ranging from 0.40 in Finland to 0.34 in Sweden. The coefficients were lower for Chinese students, being 0.22 in Hong Kong and 0.14 in B-S-J-Z, China. A similar pattern was found for the SES effect on students’ reading achievement. In the Nordic countries, around 6% of individual achievement differences can be accounted for by family ESCS. At the same time, ESCS was not an essential factor for B-S-J-Z students. The effect of students’ SES on their self-concept of reading competence was low but significant in all countries. B-S-J-Z, China students, held the highest regression coefficient at 0.18.
At the school level, the effect of school reading achievement on school average self-concept in reading competence was found to be significant in Finland (0.47), Hong Kong (0.33) and B-S-J-Z, China (− 0.16). The effect of school SES composition on school average self-concept in reading competence was statistically significant in Norway (0.44), Hong Kong (0.52) and B-S-J-Z, China (0.88). School SES composition also affected school reading achievement significantly; the effect ranged from 0.84 in Denmark to 0.58 in Norway.
In sum, for both PISA cycles, the relationship between students’ SES, academic self-concept (i.e., SCACAD in PISA 2000 and SCREADCOMP in PISA 2018) and reading achievement was significant at the individual level, higher in the Nordic countries and lower for Chinese students. School SES composition significantly affected the school’s average reading achievement at the school level. The relationship between school reading self-concept (SCREADCOMP), reading achievement, and school SES composition was significant only in Finland and B-S-J-Z, China.
Regarding the estimated peer effect, in 2018, the effect became more potent for the Nordic countries, especially in Sweden (0.73), and it was at the highest level, followed by Hong Kong (0.60) and B-S-J-Z China (0.51) (see Table 5 for more details).
Regarding the BFLPE, an inspection of the 2000 and 2018 results showed the effect was present for all countries and cycles (except for Denmark in PISA 2000; see the previous section and Table 6 for more details), which aligns with Fang et al.’s (2018) and Marsh and Hau’s (2004) results. It should be noted that both Hong Kong and B-S-J-Z can be seen as very selective school systems, and their BFLP effects were relatively minor compared with those of Nordic countries, especially in PISA 2018.
Discussion and conclusion
School contextual effects, among other things, reflect the organisational features in school systems. Over the past two decades, neoliberal ideology has become dominant in the global education systems landscape (Imsen et al., 2017; Volckmar & Wiborg, 2014). School reforms characterised by privatisation, marketisation and free choice of schools have profoundly influenced the school ethos through changes in student intakes’ SES and achievement composition, teacher quality and school resources (Adamson et al., 2016; Ahonen, 2014; Lundahl, 2016), hence perpetuating school segregation and harming educational equity (e.g., Gustafsson, Nilsen & Yang Hansen, 2018; Brathwaite, 2017; Hursh and Martine, 2003). Consequently, these organisational differentiation and policy reforms may exacerbate educational inequity and school segregation. At the same time, different education systems might experience different degrees of such change. We focused on examining whether the differences in the contextual effects across countries with very different educational traditions (Frønes et al., 2020; Blossing et al., 2014; Liu et al., 2019) could be observed over the past 20 years.
Compared with the Nordic education systems, the current study found more significant differences in performance levels and SES composition between schools in Hong Kong and B-S-J-Z, China. The latter may reflect the highly selective education systems in the two Chinese populations, where the students of different levels of ability and family socioeconomic backgrounds were selected into different schools. This sorting mechanism started in the lower secondary and continued to the upper secondary transition (Liu et al., 2019). Following this, residential segregation coupled with a school-steered housing market has also perpetuated school segregation because the residential impact dominates primary school enrolment (see, e.g., Li & Wu, 2008; Hu & Wang, 2019).
The results have also indicated that school socioeconomic and academic segregation were strengthened in Denmark and Sweden but were relatively stable in Finland and Norway. In Denmark, in addition to neoliberal and marketplace interests, the competitive discourse intensified over the past few decades (Rasmussen & Moos, 2014). In Sweden, privatisation, marketisation and choice have become more visible in the school landscape (Imsen et al., 2017; Lundahl, 2016). At the same time, Norwegian and Finnish education policy has resisted extensive privatisation of the school market (Imsen & Volckmar, 2014; see also Yang Hansen et al., 2014), even though polarisation between the schools has become more evident in Finland as well (Ahonen, 2014).
Positive peer SES effects were observed in all the studied education systems and PISA cycles. Students who attended a school with a higher school SES composition than their family socioeconomic status would gain higher academic achievement and vice versa. However, the peer SES effect varied significantly across countries. In PISA 2000, the estimate was much higher in Hong Kong than in the Nordic countries. We observed a larger peer SES effect in the Nordic countries but a minor effect in Hong Kong in PISA 2018. Being the newcomer in PISA 2018, B-S-J-Z showed a similar level to Hong Kong. Here, the peer SES effects of Sweden and two Chinese groups were at the same level.
As one of the highest achieving countries, no peer SES effect was found in Finland in PISA 2000, but in 2018, we observed a small peer SES effect. It seems that the polarisation between the schools in terms of the equity of provision (i.e., the unequal distribution of municipality funds) and students’ socioeconomic backgrounds in Finland left a toll on the system as a whole, indirectly so on the students (Ahonen, 2014). It has been shown that the SES gap in academic achievement was mainly observed at the classroom level in Finland, which can be attributed to Finnish teachers' high degree of autonomy (e.g., Sahlberg, 2011, Yang Hansen et al., 2014). A three-level analysis is warranted to reveal such differences across education systems in the future.
Interestingly, the Chinese students’ family socioeconomic background was very weakly related to their achievement. Their achievement level was modestly related to their academic self-concept (e.g., Leung, 2002; Marsh et al., 2006). From a very young age, Chinese children have been taught by their parents and teachers that education is a means of social mobility; they are instilled with the notion that hard work and drilling leads to success, which is especially true for low SES children (e.g., Jiang & Kung, 2021). The highly competitive examination-oriented school system may also have stamped all children with many experiences of failure. Moreover, Chinese children are nurtured by modesty culture and will give a lower self-evaluation when asked to do so, despite their high level of academic performance (e.g., Hau & Ho, 2012).
The current study added a layer of evidence regarding the robustness of the BFLPE (Marsh et al., 2021). Previous studies on the BFLPE have pointed out that students who attend mixed-ability classrooms or schools will suffer less in their academic self-concept than if they attend a school with homogenous, high-achieving students (e.g., Marsh et al., 2019). We found a significant BFLPE for all countries and cycles, except Denmark in PISA 2000. Because the self-concept measures used in the two PISA cycles were different, a direct comparison of the estimates in the two cycles was not appropriate. Marsh et al. (2019)Footnote 5 estimated PISA data using a fixed effect model and found a BFLPE of around -0.15 for all countries, except for Finland, which was − 0.25. Therefore, the estimates in our study were higher. However, Marsh et al.’s (2019) study did not control for SES, even though they considered other motivational factors. We argue that the confounding effect with SES in Marsh et al.’s (2019) study was not cancelled out, which may have led to an underestimation of the BFLP effects.
Even though the BFLPE across the cycles in the present study cannot be compared directly, an observed reduction in the size of the impact in some countries can result from school policy and societal changes. We observed some cross-system differences in the size of the BFLPE. For example, Swedish students seem to have been more affected by the BFLPE compared with the other education systems studied. This agrees with the results in school SES and academic segregation measures in the current study—Sweden has the highest segregated education system in the Nordic countries. In other words, students become highly homogeneous within schools. Moreover, there may be within-school ability grouping of students (e.g., Skolverket, 2012), which may strengthen the BFLPE.
Many mechanisms intertwine and affect students’ academic self-concept and achievement. It should be noted that the school contextual effects, for example, peer SES effect and/or BFLPE, are complex to study because students interact with their school- and/or classmates in a frame of comparison. School and classroom culture may ease or intensify the contextual impact on individual students.
In the present study, we observed only the school-level context. Peer effects and BFLPE at the class level are of interest because the classroom is the immediate environment for learning and social interaction. Comparisons with classmates can strongly influence students’ academic self-concept, yet this does not hold for the comparisons with students from other classes or schools (e.g., Marsh et al., 2014). Comparing within-school differences enables an unbiased estimation of the peer effect and BFLPE by considering fixed school effects. For example, all peer interaction with students in other classes within the same school will be absorbed in the school-fixed effects.
However, the current study is not without its limitations. Even though the present study used weighted likelihood estimation (WLE) of the IRT scale of the self-concept indices, there may be other sources of errors in the WLE scales that attenuated the compositional effects (Dicke et al., 2018; Marsh et al. 2009a, b). In future studies, a doubly latent variable approach should be tested to validate the estimation, as Marsh et al. (2009a, b) suggested. Moreover, the present study did not consider other related motivational factors that may confound students’ achievement and self-concepts, such as achievement goals, self-efficacy, resilience, mindset, competitiveness and collaboration. It may be of interest to include these factors when estimating the contextual effects in future studies. Finally, even though the term ‘effect’ was used to present the estimates in the two-level structural equation models, it should be emphasised that the analyses were based on cross-sectional data. Thus, causal inference has been limited. However, the results from the current study can be interpreted within the scope of extensive previous research as an additional piece of evidence supporting peer effect (e.g., Van Ewijk & Sleegers, 2010a, b; Yeung & Nguyen-Hoang, 2016), and as school contextual effects, the BFLPE was found to be affecting students’ academic self-concept and school achievement (e.g., Fang et al., 2018; Hoferichter et al., 2018; Marsh et al., 2021).
In sum, the current study has found that the countries showed indications that school academic and socioeconomic segregation has intensified over the past two decades. This finding lays the groundwork for understanding the two schools’ contextual effects (i.e., peer SES effect and BFLPE). Students’ academic achievement is positively affected by school SES compositions, and their academic self-concept is negatively related to average school achievement. Given that students’ academic and socioeconomic composition has become more homogeneous within schools, the contextual effects were more pronounced. However, the current study also observed variations across diverse educational systems. We argue that these diversities can reflect each country’s recent system reforms oriented to marketisation, privatisation and choice (e.g., Sweden), which has changed the composition of students at schools and, in turn, the school culture that moulds individual students’ cognitive and noncognitive development.
Availability of data and materials
all data in the current analyses are available at https://www.oecd.org/pisa/data/
Beijing-Shanghai-Jiangsu-Zhejiang only in 2018.
The reflection problem is one of the challenges in estimating peer effects. It is also called the simultaneity problem and arises when the achievement of peers has an influence on individual student’s achievement, which also makes up the peer group and influences their peers. This is the so-called simultaneity problem (Manski, 1993).
We refer here only to the respective benchmarking countries that have participated in PISA.
If two of the indices are missing, ESCS will not be missing. No imputation will be made (OECD, 2019).
The BFLP effect estimate was − .14 for Denmark, − .25 for Finland, − .12 for Hong Kong, − .10 for Norway and − .15 for Sweden (Martin et al., 2019).
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This is a secondary analysis of existing data. Data in this study are publicly available https://www.oecd.org/pisa/data/. Data are fully anonymized without any possibility to identify individual student and school given the information in the study. Therefore, no requirement for ethical approval or consent to participate are needed. The same reason for “consent for publication” below.
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Percentage of missing cases of each variable involve in the current study.
Self-concept in reading competence
Appendix B showed the Mplus model input for PISA 2018. The model for PISA 2000 held the same structure and command, except for the data file and actual variables in the PISA 2000 data
TITLE: Peer and BFLP effects in PISA2018 in SWEDEN;
DATA: FILE IS PISA2018_allPV.csv;
TYPE IS IMPUTATION;
VARIABLE: NAMES ARE CNT SCHID CNTSTUID ESCS SCCOMP
USEVARIABLES ARE ESCS SCCOMP PVREAD;
CLUSTER = SCHID;
MISSING ARE ALL (-99);
WEIGHT IS SENWT;
GROUPING IS CNT(208 = DNK 246 = FIN 344 = HKG 578 = NOR.
752 = SWE 975 = BSJZ);
DEFINE: PVREAD = PVREAD/100;
TYPE = TWOLEVEL;
ESTIMATOR = MLR;
SCCOMP ON PVREAD ESCS;
PVREAD ON ESCS;
SCCOMP ON PVREAD ESCS;
PVREAD ON ESCS;
SCCOMP ON PVREAD (DNK_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (DNK_PWIN);
SCCOMP ON PVREAD (DNK_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (DNK_PBTW);
DNKbflpe = DNK_betwn—DNK_within;
DNKPEER = DNK_PBTW—DNK_PWIN;
SCCOMP ON PVREAD (FIN_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (FIN_PWIN);
SCCOMP ON PVREAD (FIN_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (FIN_PBTW);
FINbflpe = FIN_betwn—FIN_within;
FINPEER = FIN_PBTW—FIN_PWIN;
SCCOMP ON PVREAD (HKG_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (HKG_PWIN);
SCCOMP ON PVREAD (HKG_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (HKG_PBTW);
HKGbflpe = HKG_betwn—HKG_within;
HKGPEER = HKG_PBTW—HKG_PWIN;
SCCOMP ON PVREAD (NOR_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (NOR_PWIN);
SCCOMP ON PVREAD (NOR_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (NOR_PBTW);
NORbflpe = NOR_betwn—NOR_within;
NORPEER = NOR_PBTW—NOR_PWIN;
SCCOMP ON PVREAD (SWE_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (SWE_PWIN);
SCCOMP ON PVREAD (SWE_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (SWE_PBTN);
SWEbflpe = SWE_betwn—SWE_within;
SWEPEER = SWE_PBTN—SWE_PWIN;
SCCOMP ON PVREAD (BSJZ_within);
SCCOMP ON ESCS;
PVREAD ON ESCS (BSJZ_PWIN);
SCCOMP ON PVREAD (BSJZ_betwn);
SCCOMP ON ESCS;
PVREAD ON ESCS (BSJZ_PBTN);
BSJZbflpe = BSJZ_betwn—BSJZ_within;
BSJZPEER = BSJZ_PBTN—BSJZ_PWIN;
OUTPUT: SAMPSTAT STDYX;
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Yang Hansen, K., Radišić, J., Ding, Y. et al. Contextual effects on students’ achievement and academic self-concept in the Nordic and Chinese educational systems. Large-scale Assess Educ 10, 16 (2022). https://doi.org/10.1186/s40536-022-00133-9
- Peer SES effect
- BFLP effect
- Academic self-concept
- The Nordic education systems
- Hong Kong