Memory Detection: Detection of Concealed Information

Memory Detection

In contrast to traditional polygraph methods, which are based upon the notion that lying is associated with stress, there is an alternative method, which is knowledge-based, known as the Concealed Information Test. This allows the investigator to determine if a crime suspect recognizes crime relevant information. The Concealed Information Test (CIT), or sometimes referred to as the Guilty Knowledge Test, uses a set of multiple-choice questions which refer to crime-specific details of the investigation in hand. For example in the case of a homicide in Byrom Street, Manchester, "The murder scene was.....:

1. Relevant Items: crime-related (e.g. "a car park in Manchester?).

2. Irrelevant Items: similar and plausible, but not crime-related alternative (e.g. "a house in Manchester?, a hotel in Manchester? etc").

The assumptions being that those suspects who possess "guilty knowledge" will recognize the crime-relevant information and react more strongly to relevant items than to irrelevant items; and those with no "guilty knowledge" will have no differential reactions to either relevant or irrelevant items. The advantage, therefore, is that for innocents there is a very low risk of being misclassified as "guilty" Research has found that the accuracy is in the region of a 95% hit rate, and that most studies reported no false positive results, i.e. misidentifying the innocent as guilty.This test is considered to be a standardised and highly accurate psychophysiological method for deception detection, and is based upon the orienting reflex. 

The Concealed Information Test is used for the evaluation of criminal suspects in criminal cases, and for the assessment of memory function in clinical cases.This test is widely accepted as a valid procedure by the scientific community around the world, and may meet what constitutes scientific evidence in legal proceedings. 

How to Schedule a Detection of Concealed Information Polygraph Examination:

You can schedule this type of polygraph examination by using our secure contact form, and we will get back to you as soon as possible to assist your investigation needs. Please note that the concealed information test relies upon the establishment the information is only known by the 'guilty' person, therefore it is crucial to ensure that 'knowledge' is kept hidden from the media or third parties.