Mazza, JamesSanders, ElizabethPhillips, Zoey2021-10-292021-10-292021-10-292021Phillips_washington_0250E_23220.pdfhttp://hdl.handle.net/1773/48005Thesis (Ph.D.)--University of Washington, 2021Autism spectrum disorders (ASD) and attention-deficit hyperactivity disorder (ADHD) are both neurodevelopmental disorders, often associated with common impairments in social and behavioral functioning (Craig et al., 2016; Golstein & Schwebach, 2004; Grzadzinski et al., 2016; Karalunas et al., 2018; Mayes et al., 2012; Ronald et al., 2014; Sokolova et al., 2017). Less is known about the population of children who have symptoms of both ASD and ADHD, but preliminary research suggests that these children may experience greater impairment compared to children with ASD or ADHD only (Antshel et al., 2016; Constantino, 2018; Grzadzinski et al., 2016; Craig et al., 2015; Rao & Landa, 2014), and respond differently to treatment (Antshel et al., 20110). The Children’s Summer Treatment Program (STP) is a comprehensive and multicomponent treatment package designed to decrease challenging behavior and increase prosocial behavior for children who may not respond to less intensive interventions (e.g. Antshel et al., 2011; Mikami et al., 2017). This study examined positive and negative behavioral functioning with a modified version of the STP for children with ASD, ADHD, and ASD + ADHD. Findings showed overall low rates of negative behavior and relatively high rates of positive behaviors across the treatment period. Diagnosis, returner status, and the interaction between these variables was a significant predictor of both Peer Problems and Defiant Behavior. Returning campers with ADHD showed the highest rates of behavior problems at baseline, and also the greatest improvements over time. Gender and attention problems at baseline were not significant predictors after accounting for other factors. More research is needed to develop sensitive measurement tools to assess children’s social functioning and monitor changes in social skills development over time.application/pdfen-USnoneADHDAutismSummer Treatment ProgramPsychologyEducation - SeattleThesis