Research suggests that the Type A pattern as assessed by the Jenkins Activity Survey (JAS) involves a number of stress-engendering cognitive/social responses. To identify potential responses responsible for social stress, the study tested the relationship between JAS Type A behavior and several cognitive/social variables relevant to assertiveness situations. Male undergraduates completed two measures of cognitive complexity and rated the reasonableness of another's request. Also, subjects were evaluated for positive content (i.e., consideration of the other) in role-played assertion responses. Type A behavior correlated with lower differentiation when sorting aspects of an assertion situation, lower integrative complexity when thinking about conflict topics, and less inclusion of consideration content. © 1991.