Post-decision confidence, decision time, and self-reported decision processes as postdictors of identification accuracy

Abstract

Post-decision confidence, decision time, and decision processes were evaluated concerning their usefulness for postdicting identification accuracy. One hundred and ninety-two participants witnessed a filmed theft and were tested with target-absent or target-present simultaneous lineups 1 week later. Post-decision confidence was positively associated with, and decision time negatively associated with choosers’ identification accuracy. For several measures of self-reported decision processes, the expected associations were non-significant. Using a decision rule including highly confident and fast participants led to more correct classifications than either variable alone. Significant associations between postdictors highlight the need to consider the different processes jointly as, in combination, they may be more useful in assessing identification decisions.

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