• Steven L Blader and Tom R Tyler.
• Stern School of Business, New York University, New York, NY 10012, USA. sblader@stern.nyu.edu
• J Appl Psychol. 2009 Mar 1; 94 (2): 445-64.

AbstractTwo field studies tested and extended the group engagement model (Tyler & Blader, 2000, Tyler & Blader, 2003) by examining the model with regard to employee extrarole behavior. Consistent with the group engagement model's predictions, results of these studies indicate that the social identities employees form around their work groups and their organizations are strongly related to whether employees engage in extrarole behaviors. Moreover, the studies demonstrated that social identity explains the impact of other factors that have previously been linked to extrarole behavior. In particular, the findings indicate that social identity mediates the effect of procedural justice judgments and economic outcomes on supervisor ratings of extrarole behavior. Overall, these studies provide compelling indication that social identity is an important determinant of behavior within work organizations and provide strong support for the application of the group engagement model in organizational settings.(c) 2009 APA, all rights reserved.

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