improve accuracy of ewt

• Eyewitness testimony


  Testimony provided by a witness to a crime or incident
• Standard interview


  • Witnesses bombarded with direct and closed questions
  • Questions not asked in order matching witness's mental representation
  • Witnesses not able to talk freely about experience
  • Frequently interrupted by investigator
• Cognitive interview


  Interview technique designed to improve accuracy of eyewitness testimony
• Cognitive interview


  1. Context reinstatement

  2. Report everything

  3. Recall from another's perspective

  4. Recall in reverse order
• Enhanced cognitive interview


  • Allows witness to control flow of information
  • Uses open-ended questions
  • Does not interrupt witness
  • Establishes rapport between interviewer and interviewee
• Cognitive interview trained detectives gained 47% more information than standard interview detectives
• Cognitive interview had similar accuracy rate (85%) to standard interview (82%)
• Combined use of context reinstatement and recall everything increased quantity of information recalled
• Cognitive interview takes more time

  Police have limited time available
• Cognitive interview requires police training

  Takes time away from other cases
• Cognitive interview not effective for identity parades and identifying subjects from photographs
• Modified cognitive interview developed for effective use with 4-5 year old children