Altruistic Decisions

Not Applicable

Terminated

• Conditions: Healthy

• Registration Number: NCT03116581
• Lead Sponsor: Hospices Civils de Lyon

Brief Summary

The study aimed to understand how payoffs for others influence perceptual decision making. The research consists in testing how varying monetary payoffs for another modify the perceptual decision making processes. The use of drift diffusion models on a random dots task enable the characterization of the decision parameter(s) that are modulated when a decision is made to win payoffs for others as compared to decisions for self-benefits. Once the parameter revealed through behavioral experiment, neuroimaging is applied to find the neural correlates of the effects of taking others into account in the decision making process.

Detailed Description

Not available

Study Timeline

• Study Start: 2014-02-03
• Primary Completion: 2016-07-22
• Study Completion: 2016-07-22
• Study First Submitted: 2017-03-07
• Study First Submitted QC: 2017-04-11
• Study First Posted: 2017-04-17
• Status Verified: 2017-11
• Last Update Submitted: 2017-11-24
• Last Update Posted: 2017-11-28

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 159

Inclusion Criteria

• Aged between 18 and 35
• Right-handed
• French
• Normal vision or corrected by contact lenses

Exclusion Criteria

• Contraindications to the MEG examination
• Presence of a perceptual disorder (vision) or motor impairing the capacity to carry out the tasks requested (including dyschromatopsia and achromatopsia).
• Taking of medical treatment in progress (excluding contraceptive pill).
• Known neurological or psychiatric history or disorders.
• Participants in an exclusion period for any other research.
• Participants who do not benefit from social protection.
• Participants refusing to be informed of the results of the medical examination.
• Participants who refuse to be informed of the possible detection of an anomaly.
• Participants with MRI contraindications

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Modulation of the decisional parameter by the payoff conditions	1 hour	behavioral data (reaction-times and accuracy) are collected and the decision parameter can be estimated from them using Drift Diffusion Models
Modulation of the decisional parameter by the beneficiary conditions	1 hour	behavioral data (reaction-times and accuracy) are collected and the decision parameter can be estimated from them using Drift Diffusion Models

Secondary Outcome Measures

Name	Time	Method
Event-Related potentials	1 hour	study of the time-locked brain activity
Time-frequency brain responses	1 hour	study of the oscillatory activity elicited in the brain
BOLD	1 hour	Variation of the blood-oxygen-level dependent (BOLD) signal

Trial Locations

Locations (1)

CH le Vinatier; 🇫🇷 Bron, France