Document Type


Date of Degree Completion

Summer 1972

Degree Name

Master of Science (MS)



Committee Chair

Warren Street

Second Committee Member

Donald R. Shupe

Third Committee Member

Max Zwanziger


This study examined the effects of experimenter motivation upon the experimenter bias effect on a person perception task. It was hypothesized that the experimenter bias effect would decrease as reward and threat of punishment increased.

Thirty-five experimenters were randomly assigned to five treatment groups including a control group, two reward groups, and two punishment conditions. Each experimenter administered the photo task to two subjects. The results failed to support the experimental hypotheses.