This is the Final Technical Research Report of the investigation of conclusions made by 75 practicing bloodstain pattern analysts on 193 bloodstain patterns selected to be broadly representative of operational casework, resulting in 33,005 responses from 27,038 classification prompts and 5,967 questions.
The project also collected 1,760 short test summary conclusions. On prompts for which the cause of the depicted bloodstains was known, 11.2 percent of responses were erroneous (calculated on responses from 11,634 classification prompts and 2,163 questions). The project also collected 1,760 short text summary conclusions. On prompts for which the cause of the depicted bloodstain was known, 11.2 percent of responses were erroneous (calculated on responses from 11,634 classification prompts and 2,163 questions). The results indicate limited reproducibility of conclusions; 7.8 percent of responses contradicted other analysts. Both semantic differences and contradictory interpretations contributed to errors and disagreements, which could have a significant impact in actual casework. 31 tables and 43 references
Downloads
Similar Publications
- Dyed Hair and Swimming Pools: The Influence of Chlorinated and Nonchlorinated Agitated Water on Surface-Enhanced Raman Spectroscopic Analysis of Artificial Dyes on Hair
- Technology-Facilitated Abuse in Intimate Partner Violence (IPV): An Exploration of Costs and Consequences, Final Report
- Psychological Safety Among K-12 Educators: Patterns Over Time, and Associations with Staff Well-being and Organizational Context