Law and Human Behavior

, Volume 10, Issue 1, pp 79-82

First online:

Notes on the psychologist expert witness

  • Reid HastieAffiliated withPsychology Department, Northwestern University


The psychologist who takes the witness stand to testify concerning the reliability of an eyewitness's testimony should assume the role of a watchdog, not a lapdog for the prosecution or an attack dog for the defense. The watchdog role is illustrated by a discussion of the decisions made by the author before accepting an invitation to testify as an expert.