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Title: You don't have to be paranoid to have insight, but it helps!
Author: Qureshi, Imran
ISNI:       0000 0001 3504 0158
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 2008
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Background: There is a considerable literature that identifies emotion recognition deficits in people who have been diagnosed with schizophrenia. These findings remain unsubstantiated, particularly when one considers the findings from studies using genuine emotions. These studies suggest poor performance might be a result of an increased sensitivity to underlying emotions which have been shown to be important in deception detection. This study aimed to investigate whether people with persecutory ideation may be better at detecting deception than people without persecutory ideation. It was also proposed that people with persecutory ideation would have a deception bias, Le. guess that people were lying more often. Method: A lie detection test was devised with 'actors' lying and telling the truth about an activity they had undertaken that induced an emotional response. Two student samples (n=21, n=17) were recruited using the extreme groups methodology from an on line questionnaire that measured persecutory ideation. The two groups observed the clips of 'actors' and were compared on accuracy (how many they got right), bias (the predictions they made) and the level of confidence with which they made their judgement. Results: There were no significant differences on overall accuracy although the group high in persecutory ideation performed better on the clips in which the lie was presented first. Neither group showed a bias toward predicting that people were deceptive or truthful. People with high persecutory ideation were much more confident in their judgements about whether the 'actor' was being deceptive or truthful but in general levels of confidence were not related to being more accurate. Conclusion: The results were inconclusive due to the small sample size and concerns about whether the lie detection tool actually measured abilities to detect lies, bias and confidence. The indication that people high in persecutory ideation were slightly better at detecting lies was considered in the context of whether they had more accurate beliefs about what to look for in a 'liar', increased sensitivity to non verbal cues or a difficulty to engage with the social choreography associated with the truth bias. These areas warrant further investigation. Differences in the levels of confidence expressed about 'actors' trustworthiness could be a result of the jumping to conclusions and disconfirmatory biases, or it could be a consequence of the measure itself. The clinical implications in relation to engagement with people with persecutory ideation and non verbal behaviour of the therapist were discussed.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available