Walden University ScholarWorks Harold L. Hodgkinson Award for Outstanding University Awards Dissertation October 2016 The ffecE t of Confirmation Bias in Criminal Investigative Decision Making Wayne A. Wallace Walden University Follow this and additional works at: http://scholarworks.waldenu.edu/hodgkinson Part of the Psychiatry and Psychology Commons, Social Psychology Commons, and the Social Psychology and Interaction Commons This Dissertation is brought to you for free and open access by the University Awards at ScholarWorks. It has been accepted for inclusion in Harold L. Hodgkinson Award for Outstanding Dissertation by an authorized administrator of ScholarWorks. For more information, please contact
[email protected]. Walden University College of Social and Behavioral Sciences This is to certify that the doctoral dissertation by Wayne A. Wallace has been found to be complete and satisfactory in all respects, and that any and all revisions required by the review committee have been made. Review Committee Dr. Kristen Beyer Committee Chairperson, Psychology Faculty Dr. David Kriska, Committee Member, Psychology Faculty Dr. Penny Devine, University Reviewer, Psychology Faculty Chief Academic Officer Eric Riedel, Ph.D. Walden University 2015 Abstract The Effect of Confirmation Bias in Criminal Investigative Decision Making by Wayne A. Wallace MA, The Chicago School of Professional Psychology, 2010 BA, Adams State College, 1986 Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy Psychology Walden University March 2015 Abstract Confirmation bias occurs when a person believes in or searches for evidence to support his or her favored theory while ignoring or excusing disconfirmatory evidence and is disinclined to change his or her belief once he or she arrives at a conclusion.