The present study examines the incremental effects of interpersonal and informational justice over three time periods on organizational citizenship behavior (OCB). Fairness heuristic theory and uncertainty management theory are used to examine whether initial justice perceptions are consistently influential over time on OCB creating a primacy effect, or if later justice perceptions are more influential on OCB than initial ones creating a recency effect. Results indicate a possible recency effect in longitudinal justice perceptions. Additionally, two individual coping styles, approach and avoidance, were examined as moderators of the justice/ OCB relationship, ft was hypothesized that higher levels of avoidance coping would make justice perceptions more influential in predicting OCB, but higher levels of approach coping would make justice perceptions less influential in predicting OCB. The hypotheses were mostly supported for OCB directed toward individuals, but not for OCB directed toward the organization. Keywords: justice over time, organizational citizenship behavior, uncertainty management theory, coping INTRODUCTION The justice literature has slowly begun to examine the dynamic nature of justice, with some studies attempting to predict within person differences of justice perceptions over time (Holtz and Harold 2009; Lilly, Virick, and Hadani 2010) and other studies focusing on the incremental impact of justice over time on outcome variables (Ambrose and Cropanzano 2003; Hausknecht, Sturman, and Roberson 2011; Kim, Lin and Leung 2015). Despite the interest in longitudinal justice effects, there still remains a dearth of studies on the topic and a lack of clear focus on applicable theory. This study contributes to the literature by examining the impact of longitudinal justice perceptions on Organizational Citizenship Behavior (OCB), a critical component in healthy organizational functioning (Podsakoff, Mackenzie, Paine, and Bachrach 2000), and investigating the impact of individual coping style to ascertain if individual coping style ameliorates the fairness effect which proposes that fair procedures tend to override negative reactions to unfavorable decision outcomes (Folger, Rosenfield, Grove, and Corkran 1979; Lind 2001). The purpose of this study is to examine whether initial justice perceptions are consistently influential over time on OCB, creating a primacy effect, or if later justice perceptions are more influential on OCB than initial ones, creating a recency effect. In addition, we examine whether (a) approach coping, or trying to change the situation by confronting the situation, and (b) avoidance coping, or trying to avoid dealing with the situation (Roth and Cohen 1986) decrease the impact of justice on OCB. Studying the effects of justice over time on OCB along with coping moderators of this relationship may help explain with more clarity specific situations in which the impact of justice is decreased. For example, are there some circumstances in which justice perceptions create a primacy effect? In other words, once initial justice perceptions are formed, do they continue to influence attitudes and behaviors over time or does the influence weaken over time? Do individual traits such as coping style reduce the fairness effect? From a theoretical perspective, answers to these questions may provide conceptual insights not currently addressed by theory. From a practical perspective, answers may provide managers with more tools to use when trying to manage employee behavior. LITERATURE REVIEW The Influence of Justice in the Workplace Justice perceptions have always been important because of their influence on important behavioral outcomes, such as OCB. OCB is helping behavior in organizations that is commonly broken into two categories: (a) behavior directed toward the overall organization; and (b) behavior directed toward particular individuals in the organization (McNeely and Meglino 1994; Williams and Anderson 1991). …