| |
Mean (SE)
|
SD
|
g
|
|---|
|
Gender
|
|
2011
|
|
Girls
|
525.7 (3.56)
|
74.93
|
0.04
|
|
Boys
|
529.1 (3.29)
|
80.75
|
|
2015
|
|
Girls
|
545.1 (2.60)
|
70.86
|
0.06
|
|
Boys
|
549.4 (2.85)
|
75.05
|
|
Country of birtha
|
|
2011
|
|
Ireland
|
–
|
–
|
–
|
|
Outside of Ireland
|
–
|
–
|
|
2015
|
|
Ireland
|
547.5 (2.17)
|
72.67
|
0.01
|
|
Outside of Ireland
|
547.7 (6.75)
|
76.86
|
|
Language spoken at home
|
|
2011*
|
|
English/Irish
|
530.9 (2.82)
|
76.88
|
0.21
|
|
Other
|
514.7 (5.00)
|
80.88
|
|
2015*
|
|
English/Irish
|
550.1 (2.34)
|
72.61
|
0.21
|
|
Other
|
534.8 (5.51)
|
76.93
|
|
No. of books at home
|
|
2011*
|
|
100 or fewer
|
517.4 (2.68)
|
75.37
|
0.51
|
|
More than 100
|
555.0 (3.18)
|
69.60
|
|
2015*
|
|
100 or fewer
|
535.2 (2.45)
|
71.85
|
0.58
|
|
More than 100
|
575.7 (2.52)
|
65.20
|
|
Highest level of parent education
|
|
2011*
|
|
No third-level education
|
508.8 (3.02)
|
74.45
|
0.56
|
|
Third-level education
|
549.7 (2.98)
|
71.06
|
|
2015*
|
|
No third-level education
|
519.8 (2.76)
|
73.41
|
0.65
|
|
Third-level education
|
564.8 (2.45)
|
66.91
|
|
School disadvantaged status
|
|
2011*
|
|
Non-disadvantaged
|
491.5 (5.43)
|
74.52
|
0.58
|
|
Disadvantaged
|
535.9 (2.94)
|
81.80
|
|
2015*
|
|
Non-disadvantaged
|
516.7 (4.71)
|
70.01
|
0.52
|
|
Disadvantaged
|
554.1 (2.25)
|
78.93
|
- *p < .05
- aData on country of birth were not collected in TIMSS 2011
