Abstract

Eyewitness Identification Research Laboratory
At the University of Texas at El Paso

Criminal Justice
Program

Psychology
Department

===========
Bibliographies

Cartoons

Consultation

Current
Research

Lab
Members

Lab
Publications

Lineups &
Evaluation

Related Links

Contact us

Home Page

Behrman, B.W & Vayder, L.T. (1994). The biasing influence of a police showup: Does the observation of a single suspect taint later identification? Perceptual and Motor Skills, 79, 1239-1248.

Investigated if a police showup (presentation of a single suspect to a witness) has a biasing effect on later identification at a lineup. 158 Ss (aged 17-30 yrs) viewed a videotape of a simulated crime photographed by a surveillance camera. After a short delay, approximately half of the Ss were shown a single photograph of an innocent suspect and told that he had been apprehended by the police. Five to 7 days later, all of the Ss, including those who had not observed the showup, viewed a photographic lineup of 6 people. The proportion of Ss choosing the innocent suspect from the lineup was significantly higher in the group who had viewed the showup than in the control group who had not observed it. Of those Ss who had observed the showup and made a choice from a subsequent lineup, approximately 40% identified the innocent suspect as the perpetrator. Results suggest that a showup procedure is a biasing method of identification.

Bibliographies | Cartoons | Consultation | Current Research | Lab Members | Lab Publications | Links | Contact Us | Home