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Experience helps older adults make better decisions than younger people



Posted On: Aug. 25, 2011

Washington, August 24 (ANI): A study has found that older adults are better at decision making than young adults as they are more experienced.

Texas psychologists tested the ability to make decisions one at a time without regard to past or future.

These psychologists designed a model requiring participants to evaluate each result in order to strategize the next choice, more like decision-making in the real world.

"We found that older adults are better at evaluating the immediate and delayed benefits of each option they choose from," Darrell Worthy, of Texas A and M University, said.

"They are better at creating strategies in response to the environment," Worthy, who conducted the study with Marissa Gorlick, Jennifer Pacheco, David Schnyer, and Todd Maddox, all at the University of Texas at Austin, stated.

In the first experiment, groups of older (ages 60 to early 80s) and younger (college-age) adults received points each time they chose from one of four options and tried to maximize the points they earned. In this portion, the younger adults were more efficient at selecting the options that yielded more points.

In the second experiment-the set up was a sham test of two "oxygen accumulators" on Mars-the rewards received depended on the choices made previously.

The "decreasing option" gave a larger number of points on each trial, but caused rewards on future trials to be lower. The "increasing option" gave a smaller reward on each trial but caused rewards on future trials to increase. The older adults did better on every permutation.

"The younger adults were better when only the immediate rewards needed to be considered," said Worthy.

"But the second experiment required developing a theory about how rewards in the environment were structured. The more experience you have in this, the better you are better at it," added Worthy.

The psychologists conjecture that these results are related to the ways we use our brains as we age.

Younger people's choice making relies on the ventral striatum, which is related to habitual, reflexive learning and immediate rewards: impulsivity. But as this portion of the brain declines, older adults compensate by using their pre-frontal cortices, where more rational, deliberative thinking is controlled.

"More broadly, our findings suggest that older adults have learned a number of heuristics"-reasoning methods-"from their vast decision-making experience," said Worthy.

The findings will be published in an upcoming issue of Psychological Science, a journal of the Association for Psychological Science. (ANI)

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