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
- Tablets behind bars: evidence from a staggered adoption difference-in-differences study of prison misconduct
- When the Management of Grief Becomes Everyday Life: The Aftermath of Murder
- Coping Patterns over Time and the Association with Stress, Depression and Self-Efficacy Among Adolescents: Latent Transition Analysis