Abstract
It is possible that eyewitnesses may not notice crimes when focused on something else due to “inattentional blindness” (IB). However, it is unclear how witnesses who experience IB will be perceived by jurors, and what factors may influence these perceptions. In study 1, mock jurors read a transcript of an assault crime, in which one witness noticed the assault and another witness did not (i.e. experienced IB). It was found that the witness who experienced IB was perceived as less credible than the witness who saw the crime. In study 2, the same trial was manipulated, such that the witnesses were either civilians or police officers, the witness who experienced IB was familiar with the defendant or not, and an expert witness provided testimony on IB or not. It was again found that the witness who experienced IB was perceived as less credible compared to the witness who saw the crime. Participants’ beliefs about IB differed depending on the presence of an expert, witness role, and witness familiarity with the defendant, but these beliefs did not translate to how the IB witness was perceived. The findings highlight the negative legal implications that may arise when witnesses (particularly civilians) experience IB for a crime.
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Notes
While we acknowledge that the number of participants excluded based on failing manipulation questions is large, the decision to exclude participants for failing manipulation checks was made prior to data collection. Additionally, we believed it important to exclude participants for failing manipulation checks based on the method through which the data was collected. Participants completed the study voluntarily as part of an in-class experiment for an introductory psychology course. Given this, we believed having stringent manipulation checks was paramount for ensuring participants took participation in the study seriously.
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The authors would like to thank Caleb Owens for assistance with data collection for study 2.
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Cullen, H.J., Paterson, H.M. & van Golde, C. Mock Juror Perceptions of Witness Inattentional Blindness. J Police Crim Psych 38, 263–280 (2023). https://doi.org/10.1007/s11896-020-09399-7
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DOI: https://doi.org/10.1007/s11896-020-09399-7