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Mind-set - How bias leads to errors in friction ridge comparisons
Heidi Eldridge1, Marco De Donno2, Christophe Champod2
1RTI International, 3040 E. Cornwallis Rd., Research Triangle Park, NC 27709, USA; University of Lausanne, Batochime Quartier Sorge, Lausanne-Dorigny, VD CH-1009, Switzerland.
Forensic Science International
|December 19, 2020
Summary
Mind-set, a confirmation bias in friction ridge analysis, can lead examiners to erroneous exclusions or identifications by preventing reconsideration of initial interpretations. Re-evaluating analysis before exclusion decisions is crucial to mitigate these errors.
Area of Science:
- Forensic Science
- Friction Ridge Analysis
Background:
- Mind-set is a confirmation bias affecting friction ridge examiners.
- It involves failing to update initial interpretations with new information.
Purpose of the Study:
- To define and illustrate mind-set in friction ridge analysis.
- To highlight its potential to cause erroneous exclusions and identifications.
- To emphasize the importance of re-evaluating analysis.
Main Methods:
- Literature review and discussion of mind-set behaviors.
- Analysis of a recent black box study on palmar comparison.
- Inclusion of illustrative examples.
Main Results:
- Mind-set can occur during mark analysis, leading to premature decisions on orientation or source.
- It can also manifest when examiners seek to confirm a suspected identification, leading to biased comparison habits.
- A recent study confirmed these behaviors in examiner annotations.
Conclusions:
- Mind-set can result in missed identifications, erroneous exclusions, or erroneous identifications.
- Examiners must re-evaluate initial analyses before concluding an exclusion.
- Mitigating mind-set is essential given high reported false negative error rates.
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