Eyewitness Testimonies

710 Words2 Pages

Eyewitness testimonies do not yield an exceptionally high validity, however they are a fairly effective way of gathering information. The Criminal justice system should take notice of the fact that they can be misconstrued since memories are fallible and can be easily influenced.
Eyewitness testimonies can be affected by many psychological factors, these include anxiety/stress, reconstructive memory, weapon focus and leading questions. Anxiety or stress is almost always associated with real life crimes. Deffenbacher (1983) reviewed 21 studies and found that the stress-performance relationship followed an inverted-U function proposed by the Yerkes Dodson Curve (1908). This means that for tasks of moderate complexity, such as EWT, performance increases with stress up to an optimal point where it then starts to decline. Nonetheless, Yuille and Cutshall (1986) illustrates that there are cases of real-life recall where memory of an anxious / stressful event is accurate. This means that the CJS should try to gather EWT as soon as possible after the event happening.
Bartlett's theory of reconstructive memory is crucial to an understanding of the reliability of EWT, he suggested that recall is subject to personal interpretation dependent on our learnt and cultural norms. We tend to see, interpret and recall what we see according to what we expect and assume is 'normal' in a given situation. Bartlett referred to these complete mental pictures of how things are expected to be as ‘schemas’. These schemas may be determined by social values and therefore prejudice. Schemas are capable of distorting unfamiliar or unconsciously 'unacceptable' information in order to fit in with our existing knowledge or schemas. This can as a result in unreli...

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...bility too highly, this may because we have too much faith in our own memory so we think it is reliable.

In conclusion, the CJS should take more notice of the problems that have been identified within eyewitness testimonies, however it would be difficult to implement another method of gathering information from the scene of a crime that would not yield similar problems. EWT can be contaminated, lost, destroyed or otherwise influenced to produce incorrect results, the best way to improve how the Criminal Justice System deals with eyewitness testimonies would be to ensure that they don’t use leading questions when interviewing or questioning witnesses, don’t solely rely on vulnerable peoples testimonies as these are not as reliable and just be aware of the general issues surrounding EWT and take this into consideration when using eyewitness testimonies as evidence .

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