Effects of Test Domain and Reasoning Level in Wechsler Subtest Scores for Autistic Children and Adults.

Concrete Spatial tests comprise Picture Completion, Picture Arrangement, and Object Assembly; Abstract Spatial comprises Block Design; Concrete Numerical comprises Digit Symbol/Coding and Digit Span; Abstract Numerical comprises Arithmetic; Concrete Verbal comprises Comprehension and Similarities; and Abstract Verbal comprises Vocabulary and Information. Composite scores were normalized to have a M = 100 and SD = 15. An ANOVA on these data indicated significant main effects of domain (F(2, 70) = 20.31, p<0.001) and reasoning level (F(1, 35) = 88.73, p<0.001) and a significant interaction between domain and reasoning level (F(2, 70) = 17.07, p<0.001).
aUnpublished data were reported in Happé (1994).