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Table 5 Rasch model of developmental difference for CELF-4 and CASL subtests and correlation with Response Dispersion Index (RDI) for participants ≤ 21 years old

From: Within-task variability on standardized language tests predicts autism spectrum disorder: a pilot study of the Response Dispersion Index

  

ASD+ person-fit

ASD− person-fit

ASD+ vs. ASD−

Pearson’s correlation person-fit vs RDI

Test

Subtest

Mean (SD)

Mean (SD)

p value

N

r

p value

CELF

Concepts and Following Directions

.53 (.231)

.73 (.255)

0.004

98

− 0.263

0.008

Formulated Sentences

.48 (.294)

.67 (.281)

< 0.001

162

− 0.938

< 0.001

Recalling Sentences

.47 (.290)

.68 (.240)

< 0.001

168

− 0.983

< 0.001

Word Structure

.48 (.256)

.66 (.235)

0.022

52

− 0.994

< 0.001

Word Definitions

.36 (.207)

.55 (.216)

0.005

61

− 0.814

< 0.001

Word Classes-Total

.54 (1.235)

1.37 (1.173)

0.004

110

− 0.983

< 0.001

CASL

Ambiguous Sentences

.29 (.266)

.45 (.259)

0.038

74

− 0.980

< 0.001

Inference

.34 (.248)

.57 (.206)

< 0.001

90

− 0.981

< 0.001

Pragmatic Judgment

.02 (.021)

.04 (.028)

< 0.001

160

− 0.861

< 0.001

Non-literal Language

.29 (.266)

.45 (.259)

0.004

120

− 0.981

< 0.001

Meaning from Context

.35 (.226)

.47 (.231)

0.105

71

− 0.975

< 0.001