19 terms

C3 Hall and Player(2008) Does Emotional Context affect fingerprint analysis?

STUDY
PLAY
Previous research to Hall and Player(2008)
Dror (2005) Student participants were affected by an emotional context which influenced their decision making when analysing poor quality prints.
Aim/Research questions of Hall and Player(2008)
Will trained experts be affected by an emotional context of incomplete poor quality prints. Are misidentifications due to emotional bias?
What real world practices was the method based upon?
Metropolitan Police Procedures/ Normal Working Practices
What causes the emotional context in real world procedures?
The details of the case are provided with the prints which can then impact on an emotional level.
Methodology/Design of Hall and Player(2008)
Laboratory experiment/Independent Measures
Sample
Volunteer sample of fingerprint analysts all from the Metropolitan Police (London)
IV of Hall and Player(2008)
Participant allocated to a high or low emotional context group
DV 1 of Hall and Player(2008) Read the report
Did the participant read the crime report prior to fingerprint examination.
DV 2 of Hall and Player(2008) Identification
Did the analyst make an identification?
DV 3 of Hall and Player(2008) Court Confidence
Would the participant be confident to present their findings in court?
Low Context group (LC)
Forgery crime (victimless)
High Context group (HC)
Murder
Results of Hall and Player(2008) - DV 1 ead the report
81.4% read the report. 52.6% (HC) and 47.4% (LC)
52% HC said they had been affected by the report compared to only 6% from the LC group.
Results of Hall and Player(2008) - DV 2 Identification
46% in LC said not enough to individualise the print compared to only 37% in the HC
Results of Hall and Player(2008) - DV 3 Confidence in Court
No significant differences between HC & LC groups in confidence to present to court.
Conclusion
Does affect analysis but does not affect their final decision. Different crime types do not significantly affect experts final decisions. There may be motivating factors and bias in the collection and processing of forensic evidence.
Evaluation; Usefulness
Results support the view that analysis is reliable enough to use in court.
Evaluation; Individual/Situational
Support individual explanation, experts not influenced by situational facotors (HC/LC)
Evaluation; Sampling bias
Volunteers who maybe were already highly confident in their ability and less likely to be influenced. All worked for the Metropolitan police. Lacks Population Validity