Comparison between two measures of delay discounting in smokers. |
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Authors: | Epstein, Leonard H. Richards, Jerry B. Saad, Frances G. Paluch, Rocco A. Roemmich, James N. Lerman, Caryn |
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Abstract: | Agreement between computer and questionnaire measures of delay discounting in smokers was compared. Correlations between measures for small, medium, or large rewards were significant. Log κ values decreased as the reward delay increased, with values lower for the computer task than the questionnaire, with significant differences for small rewards. The 2 measures were related to smoking rate but not to age, gender, or obesity. The Bland-Altman test of agreement indicated large within-subject differences in κ values between the 2 measures. The size of the difference between the log κ values and magnitude of the log κ values were positively related. Results suggest κ values from the 2 measures are related but may not be used interchangeably. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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Keywords: | delay discounting reward amounts computer measures questionnaire measures smokers reward delay |
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