ª The Author(s) 2013

Measurement in organizational psychology is dominated by the use of approaches that require the cooperation of a respondent—namely, questionnaires and interviews. The goal of this article is to increase and improve theuseof unobtrusivemeasures as a supplementalmeans toassess psychological constructs in organizational research. Specifically, we first illustrate the merit and necessity of utilizing unobtrusive measures. Next, we review the literature employing unobtrusive measures to assess psychological constructs and then discuss threats to validity associated with these approaches. Finally, we offer recommendations to enhance the effectiveness of unobtrusive measures in future research. Keywords cognition/perception, personality and individual difference, statistics/methods This survey directs attention to social science research data not obtained by interview or questionnaire. Some may think this exclusion does not leave much. It does. Many innovations in research method are to be found scattered throughout the social science literature. Their use, however, is unsystematic, their importance understated. Our review of this material is intended to broaden the social scientist’s cur-rently narrow range of utilized methodologie