Amount and time exert independent influences on intertemporal choice

Area of Science:

• Cognitive psychology
• Neuroeconomics
• Decision science

Background:

• Intertemporal choice models often assume options are evaluated holistically.
• An alternative perspective suggests separate attribute comparisons (amount vs. time).
• Understanding these processes is crucial for addressing patience-related issues like addiction and poor saving.

Purpose of the Study:

• To investigate whether attribute-wise or option-wise comparison better explains intertemporal choices.
• To identify neural and cognitive mechanisms underlying individual differences in patience.
• To link decision-making processes to attentional allocation during intertemporal choice.

Main Methods:

• Multi-attribute drift diffusion modeling (DDM) applied to intertemporal choice tasks.
• Analysis of accumulation rates for reward amount and time information.
• Eye-tracking to monitor attentional focus during decision-making.

Main Results:

• Attribute-wise comparison models intertemporal choice more effectively than option-wise comparison in young adults.
• Accumulation rates for amount and time are uncorrelated, but their difference predicts patience.
• Patient individuals integrate reward amount information earlier than time information.
• Eye-tracking data confirms that patient individuals prioritize amount over time, reflecting a rapid, attribute-wise process.

Conclusions:

• Intertemporal financial choices are determined by distinct evaluation processes for reward amount and time.
• Patience in intertemporal decision-making arises from an attribute-wise process prioritizing reward amount.
• These findings offer insights into individual differences in patience and potential interventions for related behavioral issues.