title: Sequential lineup laps and eyewitness accuracy.
abstract: Police practice of double-blind sequential lineups prompts a question about the efficacy of repeated viewings (laps) of the sequential lineup. Two laboratory experiments confirmed the presence of a sequential lap effect: an increase in witness lineup picks from first to second lap, when the culprit was a stranger. The second lap produced more errors than correct identifications. In Experiment 2, lineup diagnosticity was significantly higher for sequential lineup procedures that employed a single versus double laps. Witnesses who elected to view a second lap made significantly more errors than witnesses who chose to stop after one lap or those who were required to view two laps. Witnesses with prior exposure to the culprit did not exhibit a sequential lap effect.
authors.affiliation: Department of Psychology, Augsburg College, Campus Box 32, 2211 Riverside Avenue, Minneapolis, MN, 55454, USA. steblay@augsburg.edu
authors.forename: Nancy K
authors.initials: NK
authors.lastname: Steblay
authors.forename: Hannah L
authors.initials: HL
authors.lastname: Dietrich
authors.forename: Shannon L
authors.initials: SL
authors.lastname: Ryan
authors.forename: Jeanette L
authors.initials: JL
authors.lastname: Raczynski
authors.forename: Kali A
authors.initials: KA
authors.lastname: James
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003415:Crime; D003416:Criminal Law; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D008875:Middle Aged; D021641:Recognition, Psychology; D015203:Reproducibility of Results; D014741:Video Recording; D014796:Visual Perception; D055815:Young Adult