ROCs in Eyewitness Identification: Instructions versus Confidence Ratings |
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| Authors: | Laura Mickes Travis M. Seale‐Carlisle Stacy A. Wetmore Scott D. Gronlund Steven E. Clark Curt A. Carlson Charles A. Goodsell Dawn Weatherford John T. Wixted |
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| Affiliation: | 1. Royal Holloway, University of London, Egham, UK;2. Butler University, Indianapolis, USA;3. University of Oklahoma, Norman, USA;4. University of California, Riverside, Riverside, USA;5. Texas A&M University–Commerce, Commerce, USA;6. Canisius College, Buffalo, USA;7. Texas A&M University–San Antonio, San Antonio, USA;8. University of California, San Diego, San Diego, USA |
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| Abstract: | From the perspective of signal detection theory, different lineup instructions may induce different levels of response bias. If so, then collecting correct and false identification rates across different instructional conditions will trace out the receiver operating characteristic (ROC)—the same ROC that, theoretically, could also be traced out from a single instruction condition in which each eyewitness decision is accompanied by a confidence rating. We tested whether the two approaches do in fact yield the same ROC. Participants were assigned to a confidence rating condition or to an instructional biasing condition (liberal, neutral, unbiased, or conservative). After watching a video of a mock crime, participants were presented with instructions followed by a six‐person simultaneous photo lineup. The ROCs from both methods were similar, but they were not exactly the same. These findings have potentially important policy implications for how the legal system should go about controlling eyewitness response bias.Copyright © 2017 John Wiley & Sons, Ltd. |
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