Cortisol responsivity to the TSST-C and PEER during initial exposure to the stressor. Cortisol levels (minus expected afternoon levels) during initial exposure to the Peer Interaction Playground Paradigm (PEER; x axis) and cortisol levels (minus expected afternoon levels) during the Trier Social Stress Test – child version (TSST-C; y axis). Black circles, children with autism spectrum disorders (ASD). Both groups showed strong correlations between the 20-minute cortisol values across the social stressors. TYP, typical development.