Date: [Insert Date]
Subject: Eyewitness Testimony, Memory, and Police Interview Techniques
Overview
This lecture examines the reliability of eyewitness testimony, the reconstructive nature of memory, and modern police interviewing techniques aimed at reducing errors in witness recall.
Eyewitness Testimony and Memory
- Eyewitnesses have historically been seen as vital in criminal cases, but their accounts have sometimes led to wrongful convictions.
- Memory is reconstructive, not a perfect record; it is prone to errors and can be influenced by imagination and external suggestions.
- The Devlin Report (1970s) concluded that eyewitness evidence alone should not be sufficient for conviction.
- Memory can be contaminated by suggestions from others or by the context in which recall occurs.
Experimental Investigation
- Volunteers unknowingly witnessed a staged crime and then acted as eyewitnesses.
- Hidden cameras recorded the event, allowing comparison between actual events and witness accounts.
- Pre-event memory tests showed people often mix real details with personal associations or stereotypes.
- An actress was instructed to introduce false information, demonstrating how easily memory contamination can happen.
Police Interview Techniques
- Modern police use cognitive interviewing to improve the accuracy and amount of information from witnesses.
- Free recall: witnesses first describe events in their own words without interruption to avoid leading questions.
- Contextual reinstatement: witnesses are asked to mentally reconstruct the environment and their experience at the time of the event.
- Drawings and detailed prompts can help retrieve more memories, but accuracy is not guaranteed.
- Individual biases and stereotypes can affect memory reconstruction, leading to misidentification of people or actions.
Challenges and Findings
- Witnesses often disagree on key details such as the sequence of events, who was involved, and whether a weapon was seen.
- Even with inaccuracies, collective witness accounts may provide enough information for police to build a case.
- Accurate recall depends on careful, unbiased interviewing and an understanding of memory’s limitations.
Key Terms & Definitions
- Eyewitness Testimony: Evidence given in court by someone who has seen the event in question.
- Memory Contamination: The alteration of a memory due to external information or suggestions.
- Cognitive Interview: A police interviewing technique that uses memory reconstruction to improve recall.
- Contextual Reinstatement: Encouraging witnesses to recreate the context of an event to trigger memory.
- Free Recall: Allowing witnesses to give their account without interruption or guidance.
Action Items / Next Steps
- Review cognitive interview techniques before the next session.
- Read about the Devlin Report and its impact on criminal justice.
- Prepare for a discussion on how suggestion and stereotypes influence memory.