Theoretical foundations of the cognitive interview

The cognitive interview (CI) is grounded in psychological principles about how memory works. These theories guide the techniques used to improve recall during interviews, particularly in forensic settings like police investigations.

Core psychological principles behind the cognitive interview

• Memory traces and information types - Memories include various details, such as internal factors (e.g., emotions or mood) and external cues (e.g., smells or sights).
• Encoding specificity principle - Recall is more effective when the cues present during retrieval match those present when the memory was formed.
• Multiple cues for retrieval - Using a variety of prompts or cues enhances the likelihood of accessing stored information.
• Chronological questioning - Asking questions in a sequential order tends to produce better recall compared to random or disjointed questioning.

Background and development of the cognitive interview

The cognitive interview was developed as an alternative to traditional police interviewing methods, aiming to improve the accuracy and quantity of information recalled by witnesses. Its evolution reflects a shift towards incorporating psychological insights into practical applications.

Traditional police interview vs. cognitive interview

• Standard interview structure - As outlined by Gudjonsson (1992), this method includes four stages: orientation, listening, questions and answers, and advice. It often lacks specific memory-enhancing techniques.
• Cognitive interview structure - Developed by Geiselman et al. (1985), it also has four stages but focuses on memory retrieval:
  • Reinstate the context of the event.
  • Recall events in reverse order.
  • Report everything remembered, no matter how trivial.
  • Describe events from another person's perspective.
• Early evidence of effectiveness - Fisher et al. (1990) trained Miami Police Department detectives in CI techniques, finding a 46% increase in recalled information with 90% accuracy compared to standard methods.

Key components and effectiveness of the cognitive interview

The cognitive interview comprises several distinct techniques designed to enhance memory retrieval. Research has explored how effective each component is in practical settings, revealing varied results.

Main components of the cognitive interview

• Mental context reinstatement - Witnesses are encouraged to mentally recreate the physical and personal context of the event, including environmental details, emotions, and sensory experiences. Studies (e.g., Memon et al., 1997c; Milne, 1997) suggest witnesses often use this spontaneously, and it can be as effective as the full CI procedure.
• Report everything - Witnesses are prompted to share all details they recall, even those seeming irrelevant. This approach aids in gathering additional information and helps combine accounts from multiple witnesses.
• Recall from different perspectives - Witnesses imagine the event from another person's viewpoint. While this can produce accurate details, it doesn't always increase the amount of information recalled (Milne, 1997).
• Retrieval from different starting points - Witnesses recall events in various orders (e.g., reverse or from different moments). Evidence suggests this doesn't significantly improve recall compared to a second attempt without specific prompts (Memon et al., 1997a), though it may help with targeted cues (Milne, 1997).

Research on component effectiveness

• Varied outcomes with children - Memon et al. (1996a) found no notable difference between individual CI techniques and a control condition when interviewing children.
• Strength of full procedure - Milne (1997) indicated that the complete CI elicits more recall than individual techniques, except for context reinstatement, which stands out as particularly effective.

The enhanced cognitive interview and comparisons with other techniques

Building on the original cognitive interview, the enhanced version integrates additional strategies to improve communication and rapport. It also stands in contrast to other interviewing methods, offering unique advantages.

Features of the enhanced cognitive interview

• Integration of communication strategies - Combines cognitive techniques with improved interaction methods, such as transferring control to the witness, using open-ended questions, and avoiding interruptions.
• Interactive elements - Rapport-building supports the use of cognitive techniques, enhancing their effectiveness.
• Mental imagery techniques - Includes methods to activate visual or sensory images, though Johnson et al. (1993) warn that imagery must be used cautiously as it could distort accurate recall.

Comparison with alternative interview methods

• Standard interview limitations - Not ideal for comparison due to a lack of experimental control over variables.
• Guided Memory Interview (GMI) - Shares context reinstatement with CI but lacks the full range of cognitive strategies.
• Structured Interview (SI) - Incorporates positive communication aspects similar to the enhanced CI but omits specific cognitive techniques. CI generally elicits more information than SI while maintaining comparable accuracy.

Measures of memory performance and training quality in cognitive interviewing

Evaluating the cognitive interview involves assessing memory performance and understanding the role of interviewer training. Both aspects are critical to determining the technique's real-world applicability.

Assessing memory performance

• Common metrics - Performance is often measured by the percentage of correct statements or the total number of correct versus incorrect statements provided by witnesses.
• Limitations of metrics - These measures often overlook unreported information, which is vital for fully evaluating CI efficacy.
• Theoretical framework - Koriat and Goldsmith (1994) propose a model where retrieval, monitoring, and output control influence memory performance. CI may enhance retrieval and monitoring processes to offset shifts in response criteria.

Importance of training quality

• Early research gaps - Initial studies often failed to detail the extent or quality of training provided to interviewers.
• Demands of enhanced CI - This version requires more skill and effort from interviewers due to its complex techniques.
• Influencing factors - Interviewer attitudes, motivation, and prior experience significantly impact the effectiveness of CI application.
• Recommendations for improvement - A structured two-day training programme is advised, focusing on a select group of officers to ensure consistent skill development.

Conclusions from Memon and Higham (1999)

• Inconclusive effectiveness - Research on CI remains mixed, with further studies needed to confirm its impact on memory recall.
• Relationship with other methods - The exact connection between CI and alternative interviewing approaches is still unclear.
• Interviewer variability - Differences in interviewer performance affect outcomes, highlighting the need for standardised training.
• Future research directions - More investigation is required to identify the optimal conditions for implementing CI effectively in real-world scenarios.