Table 2: Mean, standard deviation (SD) and range of chronological age, and scores on the Japanese version of the Autism Screening Questionnaire (ASQ-J) of participants in Experiment 2.

Age (years)ASQ-J

TD ( )*
 M (SD)12.7 (2.4)2.3 (2.4)
 Range9.8–17.90–7
ASD ( )*
 M (SD)14.2 (3.7)22.4 (4.7)
 Range7.7–19.814–31

In Experiment 2, the Japanese WISC-III and WAIS-R were not administered because IQ did not influence contagious yawning in Experiment 1.