Participant demographics
| Variable | Group means | Statistics | ||
|---|---|---|---|---|
| ASD | TD | t statistic | p-value | |
| High-contrast experiment | ||||
| Age (years) | 12.7 ± 2.9 | 12.4 ± 3.1 | 0.31 | 0.76 |
| Full-scale IQ | 116.7 ± 12.4 | 107.9 ± 15.1 | 1.78 | 0.09 |
| ADOS algorithm totala | 15.7 ± 4.6 | — | — | — |
| ADI-R summary scoreb | 44.5 ± 10.5 | — | — | — |
| Low-contrast experiment | ||||
| Age (years) | 11.4 ± 2.2 | 10.7 ± 2.4 | 0.75 | 0.46 |
| Full-scale IQ | 111.4 ± 20.5 | 116.7 ± 18.2 | −0.66 | 0.52 |
| ADOS algorithm total | 12.6 ± 3.3 | — | — | — |
| ADI-R summary score | 42.3 ± 13.3 | — | — | — |
↵aAutism Diagnostic Observation Schedule (ADOS) algorithm total score (Gotham et al., 2007) summarizing communication, social, and repetitive behavior domains.
↵bAutism Diagnostic Interview-Revised (ADI-R) score collapsed across algorithm domains for communication, reciprocal social interaction, and repetitive behavior.