Table 4.

Tests of Individual Effects for CASL and PRS-SA HLM

Effects-CASL
Chronological Age	F(1,138.08) = 17.36, p < .001
Group	F(3,122.65) = 12.42, p < .001
Group x Chronological Age	F (3,151.30) = 5.83, p = .001
Mental Age	F(1,182.2) = 6.03, p = .015
Receptive Vocabulary Age Equivalent	F (1, 167.00) = 29.04, p < .001
MLU	F(1, 178.27) = 1.50, p = .22
Effects-PRS-SA
Chronological Age	F(1,50) =2.87. p = .10
Group	F(1,50) = .05, p = .82
Group x Chronological Age	F(1,50) =.003, p = .96
Mental Age	F(1,50) = .24, p = .63
Expressive Vocabulary Age Equivalent	F(1,50) = .31, p = .58
Receptive Vocabulary Age Equivalent	F(1,50) = 2.44, p = .12
MLU	F(1,50) = 1.49, p = .23

Note. CASL = Comprehensive Assessment of Spoken Language; PRS-SA = Pragmatic Rating Scale-School Age; MLU = mean length of utterance in morphemes; HLM = Hierarchical Linear Model; DS = Down syndrome; TD = typically developing.