Eyewitness Testimony and Memory Psychology

Overview of Exam and Class Structure

  • Readings and Study

    • Students noted difficulty in studying for readings.

    • Exam lacks a work bank; students will write an essay with options.

Exam Format

  • Essay

    • There will be two questions provided; students choose one to answer.

    • Expected length: 1 to 2 pages (typically between 1 to 1.5 pages).

    • Questions will be phrased to provide ample guidance for what needs to be addressed in the essay.

  • Open-Book Policy

    • The exam is not open book; no note sheets are allowed during the exam.

Class Exercises and Grading

  • Class Exercises

    • Two exercises were conducted, one graded as a standard exercise, and the other with a different grading scale.

    • Extra credit is applied to the first exam based on performance in these exercises.

  • Exam Grading Approach

    • No traditional grading curves are used.

    • Implementing an item analysis and self-correction method for grading.

    • If a significant portion of the class answers a question incorrectly (e.g., 50% or more), the instructor evaluates the fairness of that question.

    • Adjustments to scores may result from this analysis, generally adding 2-3 points to the test score.

Class Activities and Research Methods

  • Accuracy and Confidence Exercise

    • An activity involving identifying accurate pennies among several options based on confidence levels.

    • Results showed a common disconnect between confidence in answers and actual accuracy.

    • Indicates broader psychological research findings: often, people are less reliable in their recollections than they believe.

Memory and Eyewitness Testimony

Introduction

  • The focus of the upcoming lecture is the psychology of eyewitness testimony, integrating aspects of cognitive and social psychology rather than strictly clinical psychology.

  • Eyewitness testimony is critical in legal contexts, often viewed as a compelling form of evidence, with research indicating this belief may be overstated.

Significance of Eyewitness Testimony

  • It plays a major role in leading to convictions, often considered even above scientific evidence like DNA, following confessions.

  • The reliance on eyewitness testimony is notable but raises concerns regarding its accuracy, with DNA evidence increasingly revealing wrongful convictions related to flawed eyewitness accounts.

Issues with Eyewitness Testimony

Seven Reasons for Problems with Eyewitness Testimony

  1. Information Processing Model

    • Eyewitness memory formation involves multiple stages: sensory memory, short-term memory, and potentially long-term memory. Forgetting can occur at any of these stages.

    • Encoding: The process of transferring information from short-term to long-term memory; this can fail if attention is not focused on the information.

    • Retrieval: The process of recalling information from long-term memory can also fail, leading to inaccuracies in recall.

    • Important note: Connections with the short-term memory process can impact how information is recalled.

  2. Emotional Arousal and Memory

    • Memory recall is impaired when an individual experiences extreme emotional arousal; optimal retrieval occurs at moderate levels of arousal.

    • Situations that provoke high anxiety can lead to poorer memory performance.

  3. Weapon Focus Effect

    • When a weapon is present, witnesses tend to focus on the weapon rather than peripheral details, resulting in diminished memory for other crucial aspects of the event (e.g., suspect's features).

    • Noted that this is more pronounced in real-life situations due to heightened anxiety.

  4. Expectation Bias

    • Witnesses may interpret events through preconceived notions, leading them to see what they expect rather than what actually occurred.

    • Example: racial profiling can lead to biased reports of other races based on previous associations and expectations.

  5. Individual Differences

    • Performance varies among individuals regarding memory retention and recall.

    • Factors include familiarity with facial recognition, processing speed, and personal characteristics affecting remembering details.

  6. Cross-Race Effects

    • People demonstrate better recognition of faces that belong to their own race (in-group advantage) compared to faces of other races, complicating eyewitness accuracy.

  7. Misinformation Effect

    • Memories can be influenced by external suggestions and lead to the creation of false memories.

    • Example: If suggested different details during questioning, people may integrate this misinformation into their accounts, altering their memory of the event.

Conclusion

  • Awareness of the issues surrounding eyewitness testimony emphasizes the complexities of human memory and its reliability in critical contexts like the judicial system.

  • Continuous research is necessary to understand these psychological mechanisms better.