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                            Library & Multimedia
 Reliability of Pattern Classification in Bloodstain Pattern Analysis, Part 1: Bloodstain Patterns on Rigid Non-absorbent Surfaces
NCJ Number
              249866
Journal

*Journal of Forensic Sciences* Volume: 61 Issue: 4 Dated: April 22, 2016 Pages: 922-927
Author(s)
          Michael C. Taylor;
                        Terry L. Laber;
                        Paul E. Kish;
                        Glynn  Owens
Date Published

July 2016
Length
              6 pages
Annotation
              This study was designed to produce the first baseline measure of reliability in bloodstain pattern classification.
Abstract
              A panel of experienced bloodstain pattern analysts examined over 400 spatter patterns on three rigid non-absorbent surfaces. The patterns varied in spatter type and extent. A case summary accompanied each pattern that either contained neutral information, information to suggest the correct pattern (i.e., was positively biasing), or information to suggest an incorrect pattern (i.e., was negatively biasing). Across the variables under examination, 13 percent of classifications were erroneous. Generally speaking, where the pattern was more difficult to recognize (e.g., limited staining extent or a patterned substrate), analysts became more conservative in their judgment, opting to be inconclusive. Incorrect classifications increased as a function of the negatively biasing contextual information. The implications of the findings for practice are discussed.  (Publisher abstract modified)
      
  
          Additional Details
Grant Number(s)
        2010-DN-BX-K213


  
  
        
  Agencies
        NIJ-Sponsored


  
  
        
  Publication Type
        Research (Applied/Empirical)
                                Report (Study/Research)
                                Report (Grant Sponsored)


  
  
        
  Award
        Reliability Measures for Current Methods in Bloodstain Pattern Analysis
    
  
  
Date Published: July 1, 2016
    
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