Risk taking during decision-making in normal volunteers changes with age.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Behavioral Economics

Background:

• Risk-taking behavior is a complex cognitive process.
• Previous research links impulsivity to factors like age, IQ, and neuropsychiatric conditions.
• The Decision-Gamble task is a validated tool for assessing decision-making and impulsivity.

Purpose of the Study:

• To investigate the relationship between age and risk-taking behavior.
• To explore the underlying components of impulsivity using factor analysis.
• To examine the influence of IQ and sex on decision-making and risk modulation.

Main Methods:

• A cohort of 177 adults (ages 17-73) performed a computer-based gambling task (Decision-Gamble task).
• Behavioral measures including decision time, risk-taking, and delay aversion were recorded.
• Factor analysis was used to identify underlying traits of impulsivity.

Main Results:

• Risk-taking and decision-making speed decreased with age.
• Higher IQ correlated with faster decisions and greater risk-taking modulation.
• Males showed greater risk-taking modulation based on winning probability.
• Factor analysis suggested two independent traits: risk tolerance and delay aversion.
• Age negatively impacted risk tolerance but not delay aversion.

Conclusions:

• Impulsivity can be fractionated into at least two independent components: risk tolerance and delay aversion.
• Age-related cognitive changes primarily affect risk tolerance, not delay aversion.
• Decision-making processes and risk assessment are influenced by age and cognitive abilities.