Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555655
Title: Assessment of cognitive bias in social alcohol users
Author: Ataya, Alia
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2011
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Abstract:
Aims: The presence of cognitive bias towards drug-related cues is thought to play a pivotal role in the maintenance of substance use related psychopathologies. The aims of this thesis were to investigate 1) the presence of cognitive bias; 2) the effects of acute alcohol consumption (0.0 g/kg, 0.13 g/kg, 0.40 glkg) on the presence of cognitive bias; 3) whether lexical or pictorial cues are more effective in eliciting cognitive bias 4) whether the pictorial cue (active, passive) employed influences the presence of cognitive bias; 5) the psychometric properties of cognitive bias measurements (modified Stroop task, visual probe task). Methods: Healthy, heavier and lighter social alcohol users (n = 412) were examined in a series of between-and-within subjects designs examining the presence of cognitive bias among social alcohol users. Results: A priming dose of alcohol influences the presence of cognitive bias on the modified Stroop task but not on the visual probe task contradictory to prior research. Cognitive bias was observed among passive stimuli in the pictorial version of the modified Stroop task only; tentatively suggesting that the presence of cognitive bias varies according to task (modified Stroop task, visual probe task), stimuli (lexical, pictorial) and pictorial cue (active, passive). Our data are also the first to indicate that the modified Stroop task is preferable to the visual probe task as a measure of alcohol-related cognitive bias, on the basis of its psychometric properties. Conclusions: Our data suggest the presence of cognitive bias varies according to the task employed (modified Stroop task, visual probe task), task design (presentation time, blocked or unblocked designs, and stimuli) and the psychometric properties of cognitive bias tasks (internal, test-retest reliability). Future research needs to focus on ensuring the construct validity of cognitive bias measurements. Studies using cognitive bias tasks should not assume they are reliable, and should routinely report reliability estimates where possible.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.555655  DOI: Not available
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