Double-blind lineup administration refers to a lineup in which the lineup administrator does not know the identity of the suspect in the lineup. Knowledge of a lineup administrator can influence a witness’s professed confidence in the accuracy of their lineup decision. Does an investigator’s knowledge of a suspect’s identity influence eyewitness accuracy?
For years, legal psychologists have explored, with mixed results, whether demographic, personality, or attitudinal characteristics predict juror verdicts. In our laboratory, we are moving past these preliminary investigations to determine whether social psychological processes influence how and when these characteristics influence verdicts.
When the Supreme Court justices ruled that to determine the admissibility of scientific evidence judges must evaluate the scientific reliability of that evidence, their decision prompted us to investigate a variety of psychological questions about the ability of legal decision makers to differentiate valid from junk science and the efficacy of procedural safeguards against junk science.