The impact of fillers on lineup performance

摘要: Filler siphoning theory posits that the presence of fillers (known innocents) in a lineup protects an innocent suspect from being chosen by choices away suspect. This mechanism has been proposed as explanation for why simultaneous lineups (viewing all members at once) induces better performance than showups (one-person identification procedures). We implemented filler computational model (WITNESS, Clark, Applied Cognitive Psychology 17:629–654, 2003), and explored impact number (lineup size) quality on sequential sequence), compared both to showups. In limited situations, we found can produce advantage, but one is insufficient magnitude explain empirical data. However, advantage be approximated once criterial variability added model. But this modification works negatively impacting rather promoting more siphoning. lineups, were harm performance. fails clarify relationship between or By incorporating constructs like into model, trying approximate data, sort through explanations eyewitness decision-making, prerequisite policy recommendations.