Why Hypnosis Can Make Memories Harder

Introduction

When hypnosis appears in discussions of the Cash-Landrum UFO incident, the central question is often framed incorrectly. The issue is not whether the witnesses were honest or whether they genuinely believed what they remembered. Modern memory science instead asks a narrower question: does hypnosis make recalled details more accurate? The broad scientific consensus is that hypnosis may increase the amount of information a person reports and may make memories feel more vivid, but it does not reliably improve factual accuracy. More importantly, it can increase confidence in memories that are mistaken, incomplete, or partly reconstructed. As a result, details recovered under hypnosis are generally treated as leads requiring independent verification rather than as confirmed facts. [PMC+2Johns Hopkins Medicine]pmc.ncbi.nlm.nih.govPMCthe role of hypnosis in memory recall and falseby DG Leo · 2025 · Cited by 11 — In this paper, we review the current literature on the mechanisms behind the creation of false memori…

For the Cash-Landrum case, this distinction matters because some specific sighting details became associated with hypnosis-assisted recollections. Modern research therefore shifts the discussion away from witness sincerity and toward evidential standards: what can be corroborated independently, and what cannot? [PMC+2scottlilienfeld.com]pmc.ncbi.nlm.nih.govPMCthe role of hypnosis in memory recall and falseby DG Leo · 2025 · Cited by 11 — In this paper, we review the current literature on the mechanisms behind the creation of false memori…

Why Hypnosis Can Make Memories Harder

Human memory is not a video recording. Decades of research in cognitive psychology show that remembering is a reconstructive process. People rebuild past experiences from fragments of perception, later information, expectations, and repeated retellings. Under certain conditions, vivid imagination can become difficult to distinguish from actual memory. [Wikipedia]WikipediaEyewitness memoryEyewitness memory

Hypnosis does not eliminate these normal memory processes. Instead, it can intensify them. Studies of hypnotic recall have repeatedly found that people often report more information after hypnosis, but the increase in quantity is not matched by a reliable increase in accuracy. New details may be correct, incorrect, or impossible to verify. Researchers have long described this pattern as a mixture of genuine recollection, guessing, confabulation, and suggestion. [ResearchGate+2Appalachian State University]researchgate.netRelative to a normal-state control groupUse of hypnosis to enhance eyewitness accuracy: Does it work?February 1, 1983 — 42 undergraduate eyewitnesses were asked to r…Published: February 1, 1983

This is one reason forensic hypnosis largely fell out of favour in many legal and investigative settings. Concerns were not limited to outright fabrication. Even subtle cues from an interviewer, media exposure, prior discussions, or expectations about what should be remembered can shape what emerges during hypnotic recall. [scottlilienfeld.com+2Sage Journals]scottlilienfeld.comlynn2015 2Forensic Hypnosisby SJ Lynn · 2015 · Cited by 22 — The most liberal standard—per se admissibility—flies in the face of a corpus of scient…

False Confidence After Hypnosis

One of the most important findings in modern memory research is that confidence and accuracy are not the same thing. A person can be highly confident and still be mistaken. Hypnosis appears to widen that gap.

Research presented to the American Psychological Association and later discussed by investigators found that hypnosis did not improve recall accuracy but did increase subjects’ confidence in answers that were wrong. Participants became more certain of memories regardless of whether those memories were accurate. [Ohio State News]news.osu.eduOhio State News Hypnosis May Give False Confidence In Inaccurate MemoriesOhio State NewsHypnosis May Give False Confidence In Inaccurate MemoriesAugust 21, 2001 — 21 Aug 2001 — A new study suggests that hypnosi…Published: August 21, 2001

Medical and psychological reviews have reached similar conclusions. Johns Hopkins Medicine notes that hypnosis is not a reliable memory-recovery method and that hypnotised individuals often become more convinced that their recollections are accurate, even when they are not. Contemporary reviews of hypnosis and memory continue to identify heightened confidence and increased susceptibility to false memories as major concerns. [Johns Hopkins Medicine+2PMC]hopkinsmedicine.orgJohns Hopkins MedicineHypnosisAlthough there is a widespread belief that hypnosis produces accurate memories, researchers found that hypn…

This creates a difficult evidential problem. Once a witness becomes strongly convinced of a memory, ordinary methods of testing reliability become less effective. The witness may appear sincere, consistent, and emotionally persuasive while still describing a memory that has been altered by reconstruction or suggestion. [scottlilienfeld.com+2Wikipedia]scottlilienfeld.comlynn2015 2Forensic Hypnosisby SJ Lynn · 2015 · Cited by 22 — The most liberal standard—per se admissibility—flies in the face of a corpus of scient…

Corroboration as the Evidential Threshold

Because of these findings, modern investigative practice generally does not treat hypnotically recovered memories as self-authenticating evidence. Instead, the key question becomes whether independent evidence supports the recalled information.

A detail emerging during hypnosis gains evidential value only when it can be verified through other means, such as contemporaneous documents, physical traces, photographs, radar records, medical records, multiple independent witnesses, or other sources that do not depend on the hypnotic session itself. Without such support, the recovered detail remains a claim rather than a confirmed fact. [Wikipedia+2scottlilienfeld.com]WikipediaForensic hypnosisForensic hypnosis

This standard reflects a broader shift in memory science. Researchers no longer view hypnosis as a method for unlocking hidden recordings of the past. Instead, it is understood as a psychological state that can influence recall while also increasing suggestibility and the risk of memory distortion. Reviews of hypnotic hypermnesia—the idea that hypnosis enhances memory—have consistently found that any increase in remembered material is accompanied by increased error rates and does not reliably produce more accurate testimony. [Hull Repository+2Appalachian State University]hull-repository.worktribe.comHull RepositoryOne of the most persistent beliefs about hypnosis is its ability to transcend mnemonic abilities. This belief has paved th…

For that reason, investigators who still employ hypnosis typically regard information obtained during sessions as a source of possible leads rather than proof. Any useful lead must then be confirmed independently before it is treated as evidence. [Wikipedia]WikipediaForensic hypnosisForensic hypnosis

What This Means for Cash-Landrum Details

Applied to the Cash-Landrum incident, modern memory science encourages a careful separation between the core report and details that emerged or became emphasised through hypnosis.

The principal sighting claims—the witnesses’ report of a bright object, intense heat, and accompanying helicopters—were made outside hypnosis and therefore stand or fall on their own documentary and testimonial record. The scientific concerns arise most sharply when evaluating additional details that appear in hypnotic sessions or become more elaborate after them. Those details are not automatically false, but neither are they automatically reliable. [PMC]pmc.ncbi.nlm.nih.govPMCthe role of hypnosis in memory recall and falseby DG Leo · 2025 · Cited by 11 — In this paper, we review the current literature on the mechanisms behind the creation of false memori…

Under contemporary evidential standards, a hypnotically recalled feature would require independent corroboration before being granted substantial weight. If a specific colour, smell, light pattern, sequence of events, or other descriptive element appears only in hypnosis-derived testimony, memory science advises caution. The proper question is not whether the witness believed it, but whether any non-hypnotic evidence confirms it. [Johns Hopkins Medicine+2PMC]hopkinsmedicine.orgJohns Hopkins MedicineHypnosisAlthough there is a widespread belief that hypnosis produces accurate memories, researchers found that hypn…

This approach neither dismisses the witnesses nor assumes deception. Instead, it reflects what decades of research have shown about human memory: people can honestly report experiences and still unknowingly incorporate errors, especially when recall is influenced by hypnosis, repeated questioning, media attention, or strong expectations. In the Cash-Landrum case, that makes corroboration—not hypnotic confidence—the decisive threshold for evaluating disputed details. [Wikipedia+3PMC+3nantes-universite.hal.science]pmc.ncbi.nlm.nih.govPMCthe role of hypnosis in memory recall and falseby DG Leo · 2025 · Cited by 11 — In this paper, we review the current literature on the mechanisms behind the creation of false memori…

Amazon book picks

Further Reading

Books and field guides related to Why Hypnosis Can Make Memories Harder. Use these as the next step if you want deeper reading beyond the article.

Book

The Seven Sins of Memory

By Daniel L. Schacter

Rating: 3.5/5 from 5 Google Books ratings

Explains distortions, confidence, and memory errors.

See on Amazon

Book

The Myth of Repressed Memory

By Dr. Elizabeth Loftus, Katherine Ketcham

Directly addresses recovered memories and suggestion.

See on Amazon

Book

Mistakes Were Made (but Not by Me) Third Edition

By Carol Tavris, Elliot Aronson

Shows how confidence can persist despite uncertainty.

See on Amazon

Book

Mistakes Were Made (But Not by Me)

By Carol Tavris, Elliot Aronson

First published 2007. Subjects: Fouten, Vergissingen, Cognitive dissonance, Self-deception, Rechtvaardiging.

See on Amazon

Browse more on Amazon: The Seven Sins of Memory The Myth of Repressed Memory Mistakes Were Made (but Not by Me) Third Edition

As an Amazon Associate I earn from qualifying purchases.

eBay marketplace picks

Marketplace Samples

Example marketplace items related to this page. Use the search link to explore similar finds on eBay.

Shop location

Using USA USA USAUKCanadaAustraliaIreland

Example eBay listing

VINTAGE UFO ABDUCTION ILLUSTRATION FRAMED WALL ART PICTURE POSTER PRINT

Search eBay.co.uk: UFO art print

Browse similar on eBay.co.uk

Example eBay listing

Large They're Here Bob Lazar Story UFO UAP Flying Saucer Area 51 Wall Art Poster

Search eBay.co.uk: UFO art print

Browse similar on eBay.co.uk

Example eBay listing

The X Files Ufo Minimal Movie Art Print | Film Poster | Canvas & Framed

Search eBay.co.uk: UFO art print

Browse similar on eBay.co.uk

Example eBay listing

Large A0 A1 UFO UAP Close Encounter Abduction Alien Saucer Craft Wall Art Poster

Search eBay.co.uk: UFO art print

Browse similar on eBay.co.uk

Browse more on eBay.co.uk

Example items shown for inspiration; availability and pricing can change. Branchoria may earn a commission if you purchase through outbound eBay links.

Endnotes

1. Source: scottlilienfeld.com
   Title: lynn2015 2
   Link: https://scottlilienfeld.com/wp-content/uploads/2021/01/lynn2015-2.pdf
   Source snippet

   Forensic Hypnosisby SJ Lynn · 2015 · Cited by 22 — The most liberal standard—per se admissibility—flies in the face of a corpus of scient...

2. Source: Wikipedia
   Title: Forensic hypnosis
   Link: https://en.wikipedia.org/wiki/Forensic_hypnosis

3. Source: Wikipedia
   Title: Eyewitness memory
   Link: https://en.wikipedia.org/wiki/Eyewitness_memory

4. Source: Wikipedia
   Title: Eyewitness testimony
   Link: https://en.wikipedia.org/wiki/Eyewitness_testimony

5. Source: researchgate.net
   Title: Relative to a normal-state control group
   Link: https://www.researchgate.net/publication/16371513_Use_of_hypnosis_to_enhance_eyewitness_accuracy_Does_it_work
   Source snippet

   Use of hypnosis to enhance eyewitness accuracy: Does it work?February 1, 1983 — 42 undergraduate eyewitnesses were asked to r...

   Published: February 1, 1983

6. Source: nantes-universite.hal.science
   Title: Hypnosis and false memories
   Link: https://nantes-universite.hal.science/hal-04848804v1/document
   Source snippet

   Nantes Université - HAL19 Dec 2024 — Yet, many researchers and even clinicians have refuted the power of hypnosis to improve memory perfo...

7. Source: pmc.ncbi.nlm.nih.gov
   Title: PMCthe role of hypnosis in memory recall and false
   Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11832514/
   Source snippet

   by DG Leo · 2025 · Cited by 11 — In this paper, we review the current literature on the mechanisms behind the creation of false memori...

8. Source: hopkinsmedicine.org
   Link: https://www.hopkinsmedicine.org/health/wellness-and-prevention/hypnosis
   Source snippet

   Johns Hopkins MedicineHypnosisAlthough there is a widespread belief that hypnosis produces accurate memories, researchers found that hypn...

9. Source: appstate.edu
   Title: Lynn et al Recalling the unrecallable
   Link: https://appstate.edu/~bromanfulksj/Lynn%20et%20al%20-%20Recalling%20the%20unrecallable.pdf
   Source snippet

   Appalachian State UniversityRecalling the Unrecallable: Should Hypnosis Be Used to...by DG Payne · 1997 · Cited by 110 — In short, hypno...

10. Source: journals.sagepub.com
    Title: Sage Journals Hypnosis and the Law
    Link: https://journals.sagepub.com/doi/10.1177/0093854808321669
    Source snippet

    Wagstaff, 2008by GF Wagstaff · 2008 · Cited by 41 — Evaluating hypnotic memory enhancement (hypermnesia and reminiscence) using multitria...

11. Source: news.osu.edu
    Title: Ohio State News Hypnosis May Give False Confidence In Inaccurate Memories
    Link: https://news.osu.edu/hypnosis-may-give-false-confidence-in-inaccurate-memories/
    Source snippet

    Ohio State NewsHypnosis May Give False Confidence In Inaccurate MemoriesAugust 21, 2001 — 21 Aug 2001 — A new study suggests that hypnosi...

    Published: August 21, 2001

12. Source: hull-repository.worktribe.com
    Link: https://hull-repository.worktribe.com/output/373225/hypnosis-and-memory-two-hundred-years-of-adventures-and-still-going
    Source snippet

    Hull RepositoryOne of the most persistent beliefs about hypnosis is its ability to transcend mnemonic abilities. This belief has paved th...

Additional References

1. Source: ojp.gov
   Link: https://www.ojp.gov/ncjrs/virtual-library/abstracts/effects-hypnosis-and-guided-memory-eyewitness-recall-and
   Source snippet

   t found hypnotic subjects significantly less accurate than controls on recall and recognition tasks which...Read more...

2. Source: supremecourt.gov
   Title: 20201020132949171 20 5923 tsac Innocence Project
   Link: https://www.supremecourt.gov/DocketPDF/20/20-5923/158223/20201020132949171_20-5923%20tsac%20Innocence%20Project.pdf
   Source snippet

   No. 20-5923 IN THE20 Oct 2020 — a number of highly suggestive identification practices, including hypnosis, that contaminate eyewitness m...

3. Source: telegraph.co.uk
   Title: Hypnosis does not help accurate memory recall says study
   Link: https://www.telegraph.co.uk/news/worldnews/1338671/Hypnosis-does-not-help-accurate-memory-recall-says-study.html
   Source snippet

   Hypnosis does not help accurate memory recall, says study27 Aug 2001 — HYPNOSIS does not help people recall events more accurately, but d...

4. Source: heraldopenaccess.us
   Link: https://www.heraldopenaccess.us/openaccess/knowledge-on-the-influence-of-different-types-of-variables-on-eyewitness-testimony-a-survey-of-university-students-and-other-individuals-from-the-working-age-population
   Source snippet

   15... Eyewitness Confidence and Identification Accuracy: A New Synthesis.Read more...

5. Source: link.springer.com
   Title: Journal of Abnormal Psychology, 101, 521–527
   Link: https://link.springer.com/chapter/10.1007/978-1-4757-2672-5_12
   Source snippet

   springer.comHypnosis, Pseudomemories, and Clinical Guidelinesby SJ Lynn · Cited by 42 — Reports of real and false memories: The relevance...

6. Source: hypnosiscredentials.com
   Title: understanding memory and hypnosis
   Link: https://hypnosiscredentials.com/hypnosis/techniques/understanding-memory-and-hypnosis/
   Source snippet

   26 Jan 2026 — Research consistently shows that hypnotically recalled memories are not more accurate than normal memories. In many cases...

7. Source: youtube.com
   Title: The Power of Suggestion: How to Implant False Memories
   Link: https://www.youtube.com/watch?v=il0u2s_WGXA
   Source snippet

   Memory science hypnosis false memories accuracy Dealing With False Memories in Hypnosis Mike Mandel Hypnosis...

8. Source: youtube.com
   Title: Memory reconstruction, [source monitoring]({{ ‘source-errors/’ | relative_url }}), and emotional memories | Khan Academy
   Link: https://www.youtube.com/watch?v=xv-UAPbcbNU
   Source snippet

   The Power of Suggestion: How to Implant False Memories...

9. Source: digitalcommons.nl.edu
   Link: https://digitalcommons.nl.edu/cgi/viewcontent.cgi?article=1781&context=diss
   Source snippet

   Effects of Type of Recall on Memory Accuracy in an...by K McCroy · 2023 · Cited by 2 — The purpose of this study was to further examine...

10. Source: digital.library.unt.edu
    Title: 1002779655 Atkins
    Link: https://digital.library.unt.edu/ark%3A/67531/metadc332031/m2/1/high_res_d/1002779655-Atkins.pdf
    Source snippet

    EFFECTS OF HYPNOSIS AND ANXIETY...The research design encompassed all the previously covered areas including hypnosis procedures, anxiet...