Fixed Attributes and Discounting Behavior

Author:

Cao Qiongwen1,Hofmeyr Andre2,Hsu Eustace1,Luo Shan134,Monterosso John15

Affiliation:

1. Department of Psychology, University of Southern California, Los Angeles, CA, USA

2. School of Economics and Research Unit in Behavioural Economics and Neuroeconomics (RUBEN), University of Cape Town, South Africa

3. Division of Endocrinology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA

4. Diabetes and Obesity Research Institute, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA

5. Neuroscience Graduate Program, University of Southern California, Los Angeles, CA, USA

Abstract

Abstract. Delay discounting tasks present alternatives that differ in two attributes: amount and delay. Typically, choice is modeled by application of a discount function to each option, allowing alternative-wise comparison. However, if participants make decisions by comparing attributes, manipulations that affect the salience of either attribute may affect patience. In Experiment 1, participants completed one block of trials in which amount was a fixed attribute (constant across trials), and another in which delay was fixed. Consistent with the hypothesis that the varying attribute would be more salient, participants exhibited less patience in the amount-fixed condition. Moreover, this effect was larger for participants who responded more quickly when making choices that favored the varying attribute. In Experiment 2, these findings were extended by adding trial blocks with a working memory dual task. We replicated the fixed-attribute effect, along with the aforementioned association with reaction time. Contrary to expectation, the fixed-attribute effect was not larger when participants were under working memory load. Instead, working memory load was associated with more patient responses, which may be related to idiosyncrasies of the task including the absence of immediate rewards. Overall, results suggest a fixed-attribute effect on patience, which is consistent with a multi-attribute decision framework.

Publisher

Hogrefe Publishing Group

Subject

General Psychology,Arts and Humanities (miscellaneous),Experimental and Cognitive Psychology,General Medicine

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