TED Talks Daily The new science of eyewitness memory | John Wixted
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Feb 16, 2026 
John Wixted, a memory scientist who studies eyewitness ID and legal implications, challenges the idea that memory is usually unreliable. He argues for testing memory early and explains fair photo-lineup practices. He also discusses when initial confident IDs or lineup rejections can be trustworthy and why some convictions went wrong when early tests were ignored.
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Memory Reliability Depends On Timing
- Eyewitness memory isn't simply unreliable; timing and contamination of tests determine accuracy.
- Collect initial, uncontaminated memory early to get the most reliable evidence.
The Ronald Cotton Case
- John Wixted recounts Ronald Cotton's wrongful conviction after a confident courtroom ID by Jennifer Thompson.
- DNA later exonerated Cotton, revealing the dangers of trusting contaminated later IDs.
First Test Always Alters Memory
- Even a single viewing of a suspect during a lineup contaminates memory by linking that face to the crime.
- You cannot restore the original uncontaminated memory after contamination occurs.