The effect of manipulating source competence, locus of control, and social cues on perceived job scope was examined in an experimental study. A total of 185 business students participated in a 2×2×2×2 factorial research design. The design partitions were: task level (enriched versus unenriched), social cues (positive versus neutral), source competence (high versus low), and locus of control (high versus low). Subjects were screened on a locus of control measure such that those either in the upper or lower third score range were eligible to participate. A three-way interaction was found, involving source competence × social cues × locus of control on perceived job scope. The results of this study are discussed in terms of the Social Information Processing Approach (SIPA) to task design.