Reliability and validity of a paper-and-pencil survey.

Delayed rewards are commonly perceived as less valuable than immediate rewards, a phenomenon called either delay discounting or temporal discounting. Individuals with a marked preferences for smaller immediate rewards are frequently considered to be displaying behavioral impulsivity. Delay functions are typically determined by administrating a choice task where participants are required to make a series of choices between hypothetical immediate monetary rewards and larger amounts that could be obtained after a specific delay. The primary problem with this task is that, in spite of the popular use of discounting tasks, only a small number of published studies have specifically examined reliability, and none of them have examined validity. The purpose of this study was to determine the reliability and validity of an easily administered paper–pencil temporal discounting task modeled loosely on the hypothetical money choice task. [ABSTRACT FROM AUTHOR]