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

Michael I Demidenko¹, Alexander S Weigard^1,2, Karthikeyan Ganesan¹

¹Department of Psychology, University of Michigan, Ann Arbor, MI, USA.

Brain and Behavior

|March 22, 2021

Summary

Researchers found similarities between win and loss cues in reward responsiveness studies using the Monetary Incentive Delay (MID) task. Contrast choices can influence findings on individual differences and brain-behavior links.

Keywords:

Approach Avoidance Measurement Monetary Incentive Delay Prediction Error Reward Processing fMRI

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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.