Appendix A.

Measures used for each study by source.

Citation	Parent	Teacher	Self-report	Observer	Task
Andrews et al., 2013	–Affection for Others Questionnaire –General Affection Questionnaire –Social Competence with Peers Questionnaire	–	–	–	–Walk in the Forest
Begeer et al., 2011	–The Children’s Social Behavior Questionnaire	–	–The Index of Empathy for Children and Adolescents	–	–Levels of Emotional Awareness Scale for Children –The Theory of Mind Test
Begeer et al., 2015	–Social Responsiveness Scale –Social Skills Questionnaire –Theory of Mind Behavior Checklist	–Social Skills Questionnaire	–	–	–Advanced Theory of Mind Test –Levels of Emotional Awareness Scale for Children –The Theory of Mind Test
Corbett et al., 2015	–Adaptive Behavior Assessment System	–	–	–	–Developmental NEuroPSYchological Assessment
Frankel et al., 2010	–Social Skills Rating Scale	–Pupil Evaluation inventory	–Piers-Harris Self-Concept Scale –The Loneliness Scale	–	–
Gantman et al., 2012	–Social Responsiveness Scale –Social Skills Rating Scale	–	–Social Skills Inventory –Test of Young Adult Social Skills Knowledge	–	–
Ichikawa et al., 2013	–Strengths and Difficulties Questionnaire	–	–	–Interaction Rating Scale	–
Kamps et al., 2015	–	–Teacher Impression Scale	–	–Study-Developed Observation Form	–
Koenig et al., 2010	–Social Competence Inventory	–	–	–	–
Koning et al., 2013	–Social Responsiveness Scale –Vineland Adaptive Behavior Scale	–	–Social Knowledge	–Peer Interaction Measure	–The Child and Adolescent Social Perception measure
Laugeson et al., 2009	–Social Skills Rating Scale	–	–Test of Young Adult Social Skills Knowledge	–	–
Laugeson et al., 2015	–Social Responsiveness Scale –Social Skills Rating Scale	–	–Friendship Qualities Scale –Test of Young Adult Social Skills Knowledge	–	–
Lopata et al., 2010	–Adapted Skill streaming Checklist –Behavior Assessment System for Children –Social Responsiveness Scale	–	–Skill streaming Knowledge Assessment	–	–Diagnostic Analysis of Nonverbal Behavior
Rodgers et al., 2015	–The Facial Affect Rating Form	–	–	–	–
Schohl et al., 2014	–Social Responsiveness Scale –Social Skills Rating Scale	–Social Responsiveness Scale –Social Skills Rating Scale	–Friendship Qualities Scale –Social Interaction Scale –Test of Adolescent Social Skills Knowledge	–	–
Solomon et al., 2004	–	–	–	–	–Diagnostic Analysis of Nonverbal Behavior –Faux Pas Stories Task –Strange Stories Task
Thomeer et al., 2012	–Adapted Skillstreaming Checklist –Behavior Assessment System for Children –Social Responsiveness Scale	–	–Skillstreaming Knowledge Assessment	–	–Diagnostic Analysis of Nonverbal Behavior
White et al., 2007	–Social Responsiveness Scale	–	–	–	–
Yoo et al., 2014	–Asperger Syndrome Diagnostic Scale –Social Communication Scale –Social Responsiveness Scale –Vineland Adaptive Behavior Scale	–	–Friendship Qualities Scale –Social Skills Rating Scale	–Autism Diagnostic Observation Schedule	–Autism Diagnostic Observation Schedule