Skip to main content

Table 3 Group differences in mean proficiency

From: Performance decline in low-stakes educational assessments: different mixture modeling approaches

Model μ nac σ nac μ aca σ aca d (SE)
2PLM − 1.07 0.82 0a 1a 1.17 (0.020)
2PDM − 1.03 0.82 − 0.04 1.01 1.08 (0.020)
HYBRID − 1.00 0.82 0.00 1.00 1.10 (0.020)
MPDM − 1.03 0.82 − 0.03 1.00 1.09 (0.020)
  1. nac: non-academic group; aca: academic group; 2PLM: multigroup 2PLM; 2PDM: multigroup two-class performance decline model; HYBRID: multigroup HYBRID model; MPDM: multigroup multiclass performance decline model. μ and σ obtained from the marginal distribution of θ within groups
  2. aParameters are fixed