Illusory safeguards: legitimizing distortion in recall with guidelines for forensic hypnosis--two case reports

Area of Science:

• Forensic Psychology
• Cognitive Neuroscience

Background:

• Investigates the efficacy and reliability of hypnosis in memory retrieval for legal proceedings.
• Examines cases involving amnesic victims of automobile accidents seeking to recall critical lawsuit information.

Observation:

• Two amnesic patients undergoing hypnosis recalled information relevant to their legal cases.
• One patient's hypnotically influenced testimony was admitted due to adherence to recording safeguards (Hurd safeguards).
• The other patient's testimony was excluded due to failure to meet recording requirements.

Findings:

• Closed-head trauma in both cases likely inhibited long-term memory consolidation.
• Adherence to forensic hypnosis guidelines legitimized, rather than prevented, memory distortions.
• Hypnosis for hypermnesia increases recall confidence but not accuracy, making memory susceptible to postevent information.

Implications:

• Distortion of recall is an intrinsic issue with hypnosis and related procedures.
• Current guidelines for forensic hypnosis are insufficient to prevent memory inaccuracies.
• The use of hypnosis in legal contexts requires careful consideration of its potential to distort evidence.