Cognitive Interview Technique

The cognitive interview (CI) is a semi-structured interviewing technique designed to maximise the accurate information recalled by cooperative eyewitnesses, without increasing errors.

Geiselman, Fisher, MacKinnon, and Holland (1985) developed it to replace the Standard Police Interview, whose frequent interruptions, closed questions, and leading phrasing distort what witnesses recall.

The CI draws on research into cue-dependent forgetting. Its four techniques stimulate as many retrieval cues as possible to unlock different memory routes.

• Reinstate the context: Mentally rebuild the scene and how you felt at the time.
• Report everything: Say every detail, however trivial it seems.
• Change the order: Recall the event backwards rather than in sequence.
• Change perspective: Describe what another person present would have seen.

The Four Cognitive Interview Techniques

The original Cognitive Interview utilizes four main techniques designed to enhance retrieval:

1. Reinstating the Context (Mental Reinstatement)

The interviewer asks the witness to mentally recreate the context of the incident before attempting to recall the events.

This includes visualizing the physical environment (weather, sights, smells, sounds) and their internal emotional state (how they felt at the time).

This capitalizes on context-dependent memory to trigger recall.

Witnesses are often asked to use all five senses. The richer the mental picture, the more cues it supplies.

This stage rests on the encoding specificity principle (Tulving & Thomson, 1973). A retrieval cue works best when it matches the conditions present when the memory was first encoded.

Context is one such cue. The closer the recall context matches the original event, the more detail becomes accessible.

In practice, an interviewer might say: “Picture yourself back at the cash machine. It’s dark and raining, you can hear the traffic behind you, and you’re cold and anxious because you’re late.”

Only then do they ask what happened. Rebuilding the scene this way recovers detail that a direct question, such as “What did he look like?”, would miss.

2. Reporting Everything

Witnesses are encouraged to report absolutely every detail they can remember, even if it seems fragmented, trivial, or irrelevant.

Seemingly unimportant details might act as a trigger for other crucial memories.

By encouraging unedited narration, the investigator prevents the witness from self-censoring or filtering out vital information pieces.

From a cognitive standpoint, interconnected memory webs explain this phenomenon. An obscure observation can act as an effective cue that suddenly triggers the recall of central, critical facts.

Consider a witness to a shop robbery who mentions, almost in passing, that the radio was playing a particular song.

Trivial in itself, that detail can reinstate the moment. It may then cue the memory that the robber hummed along, was facing the counter, and had a tattoo on his forearm.

3. Reverse Order Recall

Recalling events out of order breaks a witness’s reliance on cognitive schemas: generalised mental scripts for how an event “usually” unfolds.

Chronological narration invites guessing. Because memory is reconstructive, witnesses fill gaps with what should have happened rather than what did.

Starting from the climax and working backward disrupts this script-driven guessing, forcing the witness to isolate and examine each fragment on its own.

An example makes this concrete. Asked to recall a bank robbery in reverse, a witness may realise that the offender carried no bag after all.

The bag came from the robbery script, not from the event. Working backwards exposed it as an assumption.

4. Changing Perspectives

The witness mentally views the incident from another person’s position, such as a bystander or the cashier, and describes what that person would have seen.

Like reverse ordering, this disrupts the witness’s own schema-driven narrative.

Anderson and Pichert (1978) showed in a classic demonstration that shifting a person’s perspective makes previously unreported information recallable, because a new perspective activates different retrieval cues.

Hidden or implicit information (knowledge the witness holds but has not consciously registered) can surface during this exercise.

Viewing the scene from where the cashier stood, for instance, may recover the position of a second offender by the door.

The witness had seen him but never consciously registered him.

The instruction needs care. Witnesses should describe what the other person could have seen, not guess what that person was thinking, or the technique invites speculation.

Flaws of the Standard Police Interview (SPI)

Understanding the Cognitive Interview’s value starts with the standard interview’s shortcomings. Police interviews limit a witness’s recall in several ways:

• Constant Interruptions: Witnesses are interrupted around 11 times, often within 7.5 seconds of starting to speak (Fisher & Geiselman, 1992). They learn to keep answers short.
• Interviewer-Driven Format: Closed questions set the pace and direction. The witness turns passive, answering only what is asked.
• Negative Phrasing and Leading Questions: Wording such as “I don’t suppose you can tell me…” demotivates witnesses, and leading questions can distort memory (Bekerian & Bowers, 1983).

Theoretical Foundations of the Cognitive Interview

The Cognitive Interview overcomes these flaws by relying on established principles of cognitive psychology:

1. Complex Memory Traces: Memory traces contain various kinds of information, and a single memory can be accessed through multiple different retrieval cues. If one cue fails, another might succeed.
2. The Encoding Specificity Principle: A retrieval cue is most effective if it closely matches the original context in which the memory was encoded (stored).
3. Memory as Reconstruction: Memory is not a recording; it is an active, reconstructive process. Recall pieces fragments together using “schemas” (general expectations that can introduce errors).

Baddeley (1999) explains why two of the four techniques work.

Reinstating context and reporting everything “provide maximum overlap between the context in which the crime was committed and the context in which the recall attempt is made.”

The other two techniques work differently.

Changing the order of recall and the witness’s viewpoint “capitalise on the idea that material can be retrieved using a number of different routes” (Baddeley, 1999).

Geiselman et al. (1985): The Original Cognitive Interview Study

A psychology laboratory experiment conducted by Geiselman, Fisher, MacKinnon, and Holland (1985) compared the cognitive interview with a standard police interview and hypnosis.

Aim: Geiselman et al. (1985) tested whether the cognitive interview recovers more information than a standard police interview or hypnosis.

Method: Participants viewed a film of a violent crime and, after 48 hours, were interviewed by a policeman using one of three methods.

1. cognitive interview;
2. standard interview used by the Los Angeles Police;
3. interview using hypnosis.

Correct facts and errors were both scored.

Results: The cognitive interview scored 41.2 correct facts on average. Hypnosis scored 38.0 and the standard interview scored 29.4.

Errors did not differ significantly between conditions.

Conclusion: The cognitive interview improves memory for events. Witnesses recall more relevant information than with a traditional interview.

A second experiment tested whether the cognitive interview leaves witnesses more resistant to misleading questions.

Researchers then asked a misleading question about a backpack that was never green (“Was the guy with the green backpack nervous?”). Witnesses interviewed with the cognitive interview were the least likely to be misled.

Critical Evaluation

Evidence of Effectiveness

Extensive research supports the efficacy of the Cognitive Interview (CI):

• Increased Accurate Recall: Geiselman et al. (1985) found 40% more correct statements than a standard interview. The Enhanced CI later reached 57.5 versus 39.6 (Fisher et al., 1987).
• Real-World Application: Miami detectives trained in the ECI obtained 46% more witness statements, over 90% of them accurate (Fisher, Geiselman, & Amador, 1989).
• Meta-Analytic Support: Köhnken et al. (1999) pooled over 50 studies and found 41% more correct details than standard interviews.
• Most Effective Components: Milne and Bull (2002) found that combining “report everything” with “reinstate the context” produced the strongest results of any technique combination.

Limitations and Criticisms

Despite its success, the Cognitive Interview has several recognized limitations:

• More Errors: Köhnken et al. (1999) found 61% more errors with the CI than with standard interviews, so police must still verify what they are told.
• Misinformation Risk: Centofanti and Reece (2006) found the CI does not reduce the effect of misleading information met after the event, so witnesses must avoid leading questions beforehand.
• Time and Training Costs: Rapport-building, free recall, and multiple perspectives take longer than a standard interview, and specialised training is often unavailable.
• Requires Cooperative Subjects: The CI assumes a willing, motivated witness and is not useful with uncooperative suspects.
• Time Sensitivity: The CI works best administered soon after the event; long delays reduce its benefit.
• Unclear Active Ingredient: The CI is a package of four techniques, so the effective part is hard to isolate. The full procedure may be more elaborate than necessary.

Why do the extra errors appear? The CI asks witnesses to report uncertain, fragmentary material and to adopt other people’s viewpoints.

That lowers the threshold for what gets said aloud, so genuine memories and confabulation (plausible but false detail) surface together. The gain in correct information is large; the rise in errors is small but real.

Contemporary Research

Recent work has focused on making the CI’s benefits cheaper, faster, and more robust to delay.

Gabbert, Hope, and Fisher (2009) developed the self-administered interview (SAI), a written protocol based on CI principles that witnesses complete themselves at the scene.

It captures a rich, context-reinstated account before memories fade or become contaminated, and can be given to many witnesses at once.

A newer timeline technique helps too. Witnesses lay out who did what and when on a physical timeline, which helps with complex events involving several offenders.

Researchers are also studying remote and video interviewing, a need sharpened by the COVID-19 period. Current work asks whether rapport-building and context reinstatement survive over a video link, and how to adapt them.

Enhanced Cognitive Interview (ECI)

Fisher, Geiselman, Raymond, Jurkevich, and Warhaftig (1987) refined the original model into the Enhanced Cognitive Interview (ECI). Fisher and Geiselman (1992) later codified it in a manual.

The ECI keeps the four core mnemonic stages. It embeds them in a broader, 13-phase structure built around the interviewee’s experience.

Structural Framework and Mnemonic Phases

The ECI organises the four mnemonic techniques into a comprehensive 13-phase structure that guides investigators systematically.

Reinstating the context and reporting everything receive the heaviest emphasis of the four, since together they improve the interviewee’s overall comfort and experience.

Within this comprehensive framework, the core memory techniques are specifically mapped to distinct phases of the interview:

• Phase 4: Mentally reinstating the original context.
• Phase 5: Reporting the event in its entirety.
• Phase 8: Adopting the physical perspective of another person present at the scene.
• Phase 9: Recalling the event in a different narrative order.

Core Communication and Social Skills

The ECI also builds in communication and social skills that create rapport with the witness and improve information retrieval.

These skills directly counter the interruptions and closed questions that define the standard interview (see Flaws of the Standard Police Interview above).

The critical skills woven into the ECI include:

• Rapport: The interviewer builds trust and eases the witness’s anxiety before starting.
• Active Listening: The interviewer avoids judgmental comments and follows up with interpretive remarks.
• Spontaneous Recall: The witness is encouraged to speak slowly and recall freely.
• Open-Ended Questions: Questions follow the witness’s own order of experiencing the event, not a fixed checklist.
• No Interruptions: The interviewer pauses after each response instead of cutting in, protecting retrieval.
• Minimal Distraction: A quiet environment supports the witness’s intense concentration.
• Tailored Language: Wording matches the witness’s linguistic and cognitive competence.
• Detailed, Imaged Accounts: The witness gives detailed accounts using mental imagery.
• Accuracy Review: The interviewer reviews the witness’s account back to them to check accuracy.

Evidence of Effectiveness and Real-World Application

Extensive laboratory and field research demonstrates the overwhelming superiority of the ECI over standard interviewing techniques:

• Laboratory Success: Fisher et al. (1987) found the ECI elicited 57.5 correct statements, versus 39.6 with a basic interview.
• Field Application: Fisher, Geiselman, and Amador (1989) found Miami detectives trained in the ECI obtained 46% more statements from victims and witnesses, over 90% of them accurate.
• Meta-Analytic Support: Bekerian and Dennett (1993) reviewed 27 experiments and found the CI about 30% more accurate, with slightly less false information.
• Confirmed at Scale: Köhnken et al. (1999) pooled over 50 studies and found 41% more correct details; Memon et al. (2010) confirmed the same pattern over 25 years of research.

Further Considerations for the ECI

The ECI shares the original CI’s core limitations: a small rise in errors, no protection against post-event misinformation, and heavy time and training demands (see Limitations and Criticisms above).

It also loses effectiveness after long delays. One further consideration is specific to the ECI.

• Need for Modifications: The ECI must be adapted for specific populations. Assessing a child’s cognitive competence led to the “Modified Cognitive Interview,” simplified for children and people with learning difficulties.

Applications of the Cognitive Interview

Beyond the laboratory, the CI has reshaped how police interview cooperative witnesses and victims. Its influence runs in three directions.

• Police Investigation: The CI’s principles sit at the heart of the PEACE model used across England and Wales.
• Vulnerable Witnesses: Adapted versions serve children and older adults, keeping rapport and context reinstatement while dropping the harder mnemonics.
• Uptake Barriers: Time pressure and patchy training mean the version delivered in the field is often not the version research tested.

Police Investigation and the PEACE Model

In England and Wales, the CI underpins the PEACE model of investigative interviewing: Planning and preparation, Engage and explain, Account, Closure, and Evaluation.

The “Account” phase draws directly on CI principles: free narration, context reinstatement, open questions, and no leading. Adopting PEACE marked a wider shift in policing, away from confession-focused interrogation and toward gathering information.

Planning and preparation set clear objectives beforehand. Engage and explain builds the same rapport the ECI emphasises. Closure ends the interview supportively, and Evaluation reviews what it contributed to the case.

Vulnerable Witnesses: Children and Older Adults

Interviewers must judge each child’s linguistic and cognitive competence before using the CI, which led to a Modified Cognitive Interview that simplifies its more demanding instructions for children.

The instruction usually dropped is change of perspective, the most cognitively demanding of the four techniques.

Wright and Holliday (2007) tested the CI with older adults. Both cognitively able and mildly impaired older witnesses recalled more correct information under the CI, without a matching rise in errors, supporting its use across the lifespan when adapted.

Barriers to Real-World Uptake

Despite this evidence, adoption stays uneven.

The full ECI takes time. It also needs skilled, maintained training. Kebbell, Milne, and Wagstaff (1999) found that under caseload pressure, officers often abbreviate the protocol, drop components, or fall back on closed questioning.

The version delivered in the field is therefore often not the version tested in research. Uptake is limited less by the CI’s validity than by the training and time it demands.

The result matters in court. CI-derived evidence, like all eyewitness testimony, still needs independent corroboration.

Key Takeaways

• Four Techniques: The CI uses context reinstatement, reporting everything, reverse-order recall, and change of perspective to maximise retrieval cues.
• Encoding Specificity: The technique rests on Tulving and Thomson’s (1973) principle that a cue works best when it matches the context in which the memory was encoded.
• More Correct Information: Geiselman et al. (1985) found about 40% more correct statements than a standard interview, with no rise in errors.
• Accuracy Trade-off: Köhnken et al. (1999) found the CI also produces about 61% more errors, so CI evidence still needs corroboration.
• Enhanced CI: The ECI adds rapport-building and witness-compatible questioning to the four core techniques, and outperforms the original CI.
• PEACE Model: The CI underpins PEACE, the framework used across England and Wales for investigative interviewing.
• Training-Dependent: The CI works best with skilled interviewers and a cooperative witness interviewed soon after the event.

References

Anderson, R. C., & Pichert, J. W. (1978). Recall of previously unrecallable information following a shift in perspective. Journal of Verbal Learning and Verbal Behavior, 17(1), 1–12.

Baddeley, A. D. (1999). Essentials of human memory. Psychology Press.

Bekerian, D. A., & Bowers, J. M. (1983). Eyewitness testimony: Were we misled? Journal of Experimental Psychology: Learning, Memory, and Cognition, 9(1), 139–145.

Bekerian, D. A., & Dennett, J. L. (1993). The cognitive interview technique: Reviving the issues. Applied Cognitive Psychology, 7(4), 275–297.

Centofanti, A. T., & Reece, J. (2006). The cognitive interview and its effect on misleading postevent information. Psychology, Crime & Law, 12(6), 669–683.

Fisher, R. P., & Geiselman, R. E. (1992). Memory-enhancing techniques for investigative interviewing: The cognitive interview. Charles C. Thomas.

Fisher, R. P., Geiselman, R. E., & Amador, M. (1989). Field test of the cognitive interview: Enhancing the recollection of actual victims and witnesses of crime. Journal of Applied Psychology, 74(5), 722–727.

Fisher, R. P., Geiselman, R. E., Raymond, D. S., Jurkevich, L. M., & Warhaftig, M. L. (1987). Enhancing enhanced eyewitness memory: Refining the cognitive interview. Journal of Police Science and Administration, 15(4), 291–297.

Gabbert, F., Hope, L., & Fisher, R. P. (2009). Protecting eyewitness evidence: Examining the efficacy of a self-administered interview tool. Law and Human Behavior, 33(4), 298–307.

Geiselman, R. E., Fisher, R. P., MacKinnon, D. P., & Holland, H. L. (1985). Eyewitness memory enhancement in the police interview: Cognitive retrieval mnemonics versus hypnosis. Journal of Applied Psychology, 70(2), 401–412.

Kebbell, M. R., Milne, R., & Wagstaff, G. F. (1999). The cognitive interview: A survey of its forensic effectiveness. Psychology, Crime and Law, 5(1-2), 101-115.

Köhnken, G., Milne, R., Memon, A., & Bull, R. (1999). The cognitive interview: A meta-analysis. Psychology, Crime and Law, 5(1-2), 3-27.

Memon, A., Meissner, C. A., & Fraser, J. (2010). The cognitive interview: A meta-analytic review and study space analysis of the past 25 years. Psychology, Public Policy, and Law, 16(4), 340–372.

Milne, R., & Bull, R. (2002). Back to basics: A componential analysis of the original cognitive interview mnemonics with three age groups. Applied Cognitive Psychology, 16(7), 743–753.

Tulving, E., & Thomson, D. M. (1973). Encoding specificity and retrieval processes in episodic memory. Psychological Review, 80(5), 352–373.

Wright, A. M., & Holliday, R. E. (2007). Interviewing cognitively impaired older adults: How useful is a Cognitive Interview? Memory, 15(1), 17-33.

Further Reading