Self-efficacy in Pathological Gambling Treatment Outcome: Development of a Gambling Abstinence Self-efficacy Scale (GASS)
Date
2004-11
Journal Title
Journal ISSN
Volume Title
Publisher
Routledge, part of the Taylor & Francis Group
Abstract
A 21-item measure of gambling abstinence self-efficacy (GASS) was developed.
Principal component analyses of 101 pathological gamblers supported the use of a total
score that showed good internal (a = .93) and retest reliability (ICC (n = 35) = .86) as
well as four subscales: 1) winning/external situations (6 items, a = .91); 2) negative
emotions (9 items, a = .87); 3) positive mood/testing/urges (3 items, a = .70); and 4)
social factors (3 items, a = .81). The total and subscales showed moderate relationships
with single item ratings of confidence to abstain from gambling and weak or nonsignificance
relationships with demographic and gambling-related variables. The total
score and three of the subscales showed evidence of predictive validity for gamblers not
currently involved with treatment. Higher self-efficacy was related to fewer days of
gambling over a 12-month period. These results provide preliminary support for the
reliability and validity of the GASS.
Description
The official version of scholarly record is accessible from
http://www.journalsonline.tandf.co.uk/openurl.asp?genre=issue&eissn=1479-4276&volume=4&issue=2
Keywords
Compulsive gambling -- Diagnosis, Compulsive gambling -- Treatment
Citation
International Gambling Studies, 4(2), 99-108.