The main purpose of this study was to examine the relationships among perceived competence, perceived motivational climate, and participation behaviors of children with movement difficulties (MD) in physical education. Behaviors of 65 children with MD and 65 matched peers without MD from Grades 4-6 were observed and coded. A MANOVA revealed significant differences between the two groups in the proportions of adaptive and maladaptive behaviors. Hierarchical regression analyses indicated a tendency for participants with MD with higher self-reported perceptions of competence to spend proportionally more time engaged in adaptive behaviors and less time engaged in maladaptive behaviors. Significant interactions revealed that the effect of self-reported perceptions of a performance climate on participation was conditional upon perceived competence levels.