Abstract
Presentation order of ID and Alibi evidence was manipulated for undergraduate participants who conducted a simulated police investigation. Experiment 1 found a recency effect when an eyewitness rejected the investigator’s suspect. Experiment 2 also examined order effects, exploring how participant–investigators evaluated alibi information in addition to eyewitness ID information. When investigators saw the witness identify the suspect but also received a strong alibi for that suspect a recency effect occurred, such that whichever piece of information occurred at the end of the procedure had the strongest impact on investigators. Thus, type of evidence and evidence order both had a dramatic influence on participant–investigators’ decisions.
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Notes
However, all participants in this study chose the same suspect as the database was designed to suggest the guilt of that suspect.
Both the strong and weak videos were pilot tested to ensure that they were viewed as appropriately strong and weak alibis. In the weak alibi condition the mean was 3.14 with a standard deviation of 1.33. In the strong alibi condition the mean was 7.83 with a standard deviation of 1.54.
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Acknowledgments
The authors would like to thank J. Don Read and Dan Yarmey for their comments on an earlier version of this work. This work was supported by funding from the Social Sciences and Humanities Council of Canada.
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Dahl, L.C., Brimacombe, C.A.E. & Lindsay, D.S. Investigating Investigators: How Presentation Order Influences Participant–Investigators’ Interpretations of Eyewitness Identification and Alibi Evidence. Law Hum Behav 33, 368–380 (2009). https://doi.org/10.1007/s10979-008-9151-y
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DOI: https://doi.org/10.1007/s10979-008-9151-y