Interactions between methodological and interindividual variability: How Monetary Incentive Delay (MID) task contrast...

Area of Science:

• Neuroscience
• Psychology
• Cognitive Science

Background:

• Reward responsiveness is linked to substance use and socioemotional functioning.
• The Monetary Incentive Delay (MID) task is crucial for studying reward responsiveness.
• Limited research systematically evaluates MID task contrasts' impact on findings.

Purpose of the Study:

• To evaluate similarities and differences between common MID task contrasts.
• To assess the impact of contrast choices on individual differences in reward responsiveness.
• To examine brain-behavior associations within MID task analyses.

Main Methods:

• Analyzed data from 104 participants using the MID task.
• Compared group and individual activation maps with Jaccard's similarity index.
• Assessed region of interest (ROI) signal intensities and psychological associations using Bayesian correlation.

Main Results:

• Found more similarities than differences between win and loss cues in the anticipation phase.
• Observed dissimilarity in some win anticipation contrasts.
• Noted an apparent deactivation in the outcome phase and less robust behavioral associations than previously reported.

Conclusions:

• MID task contrast choices can modify results concerning individual differences.
• Findings aid researchers in interpreting prior MID studies.
• Informed a priori decisions regarding contrast selection in reward responsiveness research.