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Measuring Delay Discounting in Humans Using an Adjusting Amount Task
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Older adults, especially those with cognitive impairments, discount future rewards and losses more heavily. Unimpaired older adults show patience, possibly due to compensatory mechanisms in decision-making.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Behavioral Economics

Background:

  • Individuals often prioritize immediate gains and delay future costs.
  • Research on future discounting in senior citizens is limited and yields conflicting results, often focusing on gains rather than losses.

Purpose of the Study:

  • To investigate future discounting behavior across different aging groups, controlling for demographic confounds and aging variability.
  • To compare decision-making between middle-aged, unimpaired older adults, and cognitively impaired older adults regarding monetary rewards and losses.

Main Methods:

  • A comparative study design involving three participant groups: middle-aged adults, unimpaired older adults, and impaired older adults.
  • Participants made choices between immediate, smaller monetary rewards/losses and delayed, larger monetary rewards/losses.

Main Results:

  • Cognitively impaired older adults exhibited greater future discounting compared to unimpaired older adults.
  • Middle-aged adults showed similar future gain discounting as impaired older adults but less future loss discounting.
  • Unimpaired older adults demonstrated more patient choices, suggesting potential compensatory strategies.

Conclusions:

  • Cognitive impairment in older adults significantly influences future discounting, leading to greater preference for immediate rewards.
  • Unimpaired older adults may employ compensatory mechanisms to maintain patient decision-making, despite age-related cognitive changes.
  • Findings contribute to understanding the neurobiology and neuropsychology of aging and decision-making.