title: How bad was it? Differences in the time course of sensitivity to the magnitude of loss in problem gamblers and controls.
abstract: Previous research has shown that pathological gamblers show various cognitive distortions, especially in interpreting near losses. Using a modified blackjack task, we investigated the electrophysiological responses to near and full losses in problem gamblers and controls. We assessed the event-related brain potentials (ERPs) of 20 problem gamblers and 21 controls at two time points following negative game outcomes. We also studied the behavioral changes after near and full loss experiences. Between 270 and 320 ms following a loss, controls but not gamblers showed a differential ERP response to near and full losses suggesting that a near loss is evaluated more negatively than a full loss. However, between 430 and 480 ms after a loss, the ERPs of both, gamblers and controls, showed a differential response as a function of the type of loss. Both groups became more cautious in their subsequent gambling behavior following near loss. The present study revealed differences in the time course of processing negative feedback in problem gamblers and normal controls, which might be due to gamblers preoccupation with gains rather than with losses.
authors.affiliation: Department for Biological and Clinical Psychology, Friedrich Schiller University Jena, Germany. luisa.kreussel@uni-jena.de
authors.forename: Luisa
authors.initials: L
authors.lastname: Kreussel
authors.forename: Johannes
authors.initials: J
authors.lastname: Hewig
authors.forename: Nora
authors.initials: N
authors.lastname: Kretschmer
authors.forename: Holger
authors.initials: H
authors.lastname: Hecht
authors.forename: Michael G H
authors.initials: MG
authors.lastname: Coles
authors.forename: Wolfgang H R
authors.initials: WH
authors.lastname: Miltner
mesh_terms: D000328:Adult; D001921:Brain / Q000503:physiopathology*; D001931:Brain Mapping; D003657:Decision Making / Q000502:physiology; D005071:Evoked Potentials / Q000502:physiology*; D030141:Feedback, Psychological / Q000502:physiology*; D005260:Female; D005715:Gambling / Q000503:physiopathology* / Q000523:psychology; D006801:Humans; D008297:Male; D012201:Reward; D011795:Surveys and Questionnaires; D013997:Time Factors