AO3

• The cognitive interview may have little practical value, due to being too time-consuming and requiring specialist skills. For example, Kebbel and Wagstaff argued that only a few hours of training, as is possible for many police forces, is insufficient to adequately train interviewers, especially for the enhanced social understanding required for the enhanced cognitive interview. Therefore, this lack of time for training may explain why some forces may be unimpressed with the CI.
• The CI does not only increase the recall of correct information by 81%, but also increases the recall of incorrect information by 61%, as suggested by Kohnken et al (1999). This appears counterintuitive when considering that the chief aim of the CI was to improve the accuracy of recall of correct information and so increase the reliability of eyewitness testimonies as a whole.
• One of the problems with evaluating the effectiveness of the CI when it is used in the real world is that it is not really just one 'procedure', but a collection of related techniques. For example, Thames Valley Police use a version that does not include the 'changing perspectives' component. Other police forces that describe themselves as using the CI technique have tended to use only the reinstate context' and 'report everything components of the Cl (Kebbell and Wagstaff, 1996) This means that it is hard to establish the overall effectiveness of the technique when using all components