• Joshua B B Garfield, Sue M Cotton, and Dan I Lubman.
• Turning Point, Eastern Health, 54-62 Gertrude Street, Fitzroy, Victoria 3065, Australia; Eastern Health Clinical School, Faculty of Medicine, Nursing, and Health Sciences, Monash University, Level 2, 5 Arnold Street, Box Hill, Victoria 3128, Australia. Electronic address: joshuag@turningpoint.org.au.
• Drug Alcohol Depend. 2016 Apr 1; 161: 238-46.

BackgroundIndividuals with substance dependence commonly experience anhedonia. Theories of anhedonia distinguish between anticipatory and consummatory reward deficits, with the Temporal Experience of Pleasure Scale (TEPS) the first self-report scale to separately measure these two constructs. Several psychometric studies have analysed the trait version of the TEPS, but the state version of the TEPS has not been previously validated.MethodsWe examined the psychometric properties of the state version of the TEPS in 121 individuals with opiate dependence (81% Australian-born), to confirm its 2-factor structure and examine the internal consistency, convergent and divergent validity, test-retest reliability, and performance as a state measure.ResultsConfirmation of the 2-factor solution required removal of two items and allowing correlation between residuals of three pairs of highly-similar items. The resulting consummatory and anticipatory scales correlated strongly with each other (r=.76), suggesting poor divergent validity between them. Nevertheless, the scale showed good internal consistency (Chronbach's α: anticipatory=.90; consummatory=.84; total=.92), convergent (TEPS total and Snaith-Hamilton Pleasure Scale r=-.76) and divergent validity (-.38ConclusionIn opioid-dependent participants, the TEPS state version appeared to have good validity as a measure of state anhedonia. However, evidence for its ability to distinguish between consummatory and anticipatory anhedonia was weak.Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

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