Temporal and spatial discounting are distinct in humans.

Area of Science:

• Behavioral economics
• Cognitive psychology
• Neuroscience

Background:

• Previous research on reward discounting primarily focused on temporal discounting, with limited investigation into spatial discounting.
• Existing literature suggests a correlation between temporal and spatial discounting, though this is debated.
• Understanding how individuals value rewards across space and time is crucial for decision-making models.

Purpose of the Study:

• To investigate the behavioral effects of spatial discounting.
• To examine the relationship between spatial and temporal discounting within a controlled environment.
• To determine if spatial and temporal estimations are independent when discounting monetary rewards.

Main Methods:

• Three studies utilized a spatial and temporal discounting task within a virtual reality (VR) environment.
• Participants chose between monetary rewards varying in distance (space) and duration (time).
• Movement speed within the VR environment was manipulated in experiments 2 and 3 to further probe spatial perception.

Main Results:

• The study provides initial evidence for the independent estimation of space and time during reward discounting.
• Contrary to some previous findings, results suggest a dissociation between spatial and temporal discounting.
• Behavioral data indicates that spatial and temporal factors may be processed separately in decision-making.

Conclusions:

• Spatial and temporal discounting appear to be distinct cognitive processes.
• The findings challenge previous assumptions of an inherent link between spatial and temporal discounting.
• This research offers new insights into the independent valuation of rewards based on spatial and temporal attributes.