Amount and time exert independent influences on intertemporal choice

被引:116
作者
Amasino, Dianna R. [1 ,2 ]
Sullivan, Nicolette J. [2 ]
Kranton, Rachel E. [3 ]
Huettel, Scott A. [2 ,4 ]
机构
[1] Duke Univ, Dept Neurobiol, Durham, NC USA
[2] Duke Univ, Ctr Cognit Neurosci, Durham, NC 27708 USA
[3] Duke Univ, Dept Econ, Durham, NC 27706 USA
[4] Duke Univ, Dept Psychol & Neurosci, Durham, NC 27708 USA
基金
美国国家科学基金会;
关键词
DIFFUSION DECISION-MODEL; FUTURE SELF-CONTINUITY; INFORMATION DISPLAYS; INDIVIDUAL-DIFFERENCES; NEURAL MECHANISMS; WORKING-MEMORY; ATTENTION; PREFERENCES; DYNAMICS; SEARCH;
D O I
10.1038/s41562-019-0537-2
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Intertemporal choices involve trade-offs between the value of rewards and the delay before those rewards are experienced. Canonical intertemporal choice models such as hyperbolic discounting assume that reward amount and time until delivery are integrated within each option prior to comparison(1,2). An alternative view posits that intertemporal choice reflects attribute-wise processes in which amount and time attributes are compared separately(3-6). Here, we use multi-attribute drift diffusion modelling (DDM) to show that attribute-wise comparison represents the choice process better than option-wise comparison for intertemporal choice in a young adult population. We find that, while accumulation rates for amount and time information are uncorrelated, the difference between those rates predicts individual differences in patience. Moreover, patient individuals incorporate amount earlier than time into the decision process. Using eye tracking, we link these modelling results to attention, showing that patience results from a rapid, attribute-wise process that prioritizes amount over time information. Thus, we find converging evidence that distinct evaluation processes for amount and time determine intertemporal financial choices. Because intertemporal decisions in the lab have been linked to failures of patience ranging from insufficient saving to addiction(7-13), understanding individual differences in the choice process is important for developing more effective interventions.
引用
收藏
页码:383 / 392
页数:10
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