Page 195 - Second language development of newly arrived migrant kindergarteners - Frederike Groothoff
P. 195

The influence of the school learning environment 195   5 4,5 4 3,5 3 2,5 2 1,5 1 0,5 0 Growth MLR Within 80% - Within 80% + Between 80% - Between 80% +          Age in Months Figure 8.13: Graphical Representation of the General Development Model Growth MLR score (162 cases) with 80% Reliability. Figure 8.13 shows that the effect of Age on MLR was significant. This is a quadratic relation; the increase in vocabulary development is larger for younger pupils. The differences within individuals (represented by the striped lines in Figure 8.13) also depend on Age; we can give a more precise estimate of the vocabulary development for younger pupils as compared to older pupils. The differences between individuals (represented by the dotted lines in Figure 8.13) are a function of Age as well; differences between younger individuals are smaller than those between older pupils. The addition of the percentage of time spent in Peer Interaction did not improve the General Development Model of MLR (MLRVIII). However, an interaction between Age and percentage of time spent in Peer Interaction was found (ΔΧ2 (MLRIX) = 5.21; df = 1; p = .02; see Table 8.18). Table 8.18: Fit of Different Polynomials (-2LL) for Changes in MLR score (162 cases) with the Addition of Peer Interaction (PeerInt) as Explanatory Variable.     Model -2LL MLRV: β0ijcons + β1ijAge1ij + 642.81 β2Age2ij MLRVIII: MLRV + β3PeerIntij 642.39 MLRIX: MLRVIII + 637.18 β4Age*PeerIntij Comparison Models MLRV vs MLRVIII MLRVIII vs MLRIX ΔΧ2 Δdf p 0.42 1 .52ns 5.21 1 .02                51 55 59 63 67 71 75 79 83 87 91 95 99 103 Measure of Lexical Richness 


































































































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