University of Missouri - Saint Louis

The Graduate School


An oral examination in defense of the dissertation for the degree

Doctor of Philosophy in Psychology

Kimberly Perry
M.A. Psychology, May 2008, University of Missouri-St. Louis.
B.A. Psychology and French, May 2005, St. Cloud State University.

Role Breadth and OCB: An Investigation of Antecedents and Consequences



Two studies were conducted to further investigate how organizational citizenship behavior (OCB) is conceptualized through the psychological mechanisms relating to OCB role definition, outcomes of OCB role definition, and the structure of OCB definition ratings. Previous research on OCB has suggested that organizational members have different perspectives, such that supervisors have a broader role definition than do their subordinates (Morrison, 1994). Study 1 tested a theoretical model using SEM that included the underlying psychological processes that relate to role breadth as well as individual-level and organizational-level outcome variables. The results supported a positive significant relationship between employee rated OCB definition and supervisor rated OCB performance, which extended work by Chiaburu and Byrne (2009). OCB role definition mediated the relationship between some of the antecedents (job involvement and psychological contracts) and OCB performance. Study 2 investigated the structure of role breadth by comparing subordinate and supervisor ratings through measurement invariance and multidimensional scaling. While supervisors are more likely to rate OCB as being in-role than employees, the results from Study 2 concluded that employees and supervisors have a similar cognitive understanding of OCB definition. Limitations and implications of this study were discussed.


Date: October 4, 2013

Time: 1:00 p.m. to 3:00 p.m.

Place: 121 Research Hall


Defense of Dissertation Committee


John Meriac, Ph.D. (Advisor)

Stephanie Merritt, Ph.D.


Mark Tubbs, Ph.D.

Ekin Pellegrini, Ph.D.

Cody Ding, Ph.D.