Social Decision-making (SOCIAL-DECISION)

NCT03095794 | Terminated

• 1 other identifier: 69HCL16_0679
• Study Type: interventional
• Target: 145
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to investigate neural mechanism of healthy humans underlying group decision making and compare it with that of individual decision-making. Using functional neuroimaging technology combining with computational modeling, we examine how the human brain process social information to make a decision within a group, which often guides humans to make a better decision using collective wisdom.

Conditions

Healthy

Outcome Measures

Primary Outcomes (1)

• Brain activation associated with decision-making (fMRI, non-invasive measure)

  1 hour in a fMRI scanner

  Day 1

Study Arms (1)

neural mechanisms of decision making

EXPERIMENTAL

Previous studies on how brain manages a value-based decision have been bounded to individual decisions. The current study will extend the understanding of social dimensions by answering four questions.

Other: How people learn another's value preference during decision under risk; Other: Neural mechanism of making a group decision under risk that influences on in-group members; Other: Neural mechanism of making a group decision that influences on out-group members; Other: fMRI

Interventions

How people learn another's value preference during decision under risk OTHER

The aim of this study is to investigate how an agent learns another's value preference when they should make decisions on behalf of another. This experiment consists of 3 parts(i) measuring individual's loss aversion; (ii) feedback based learning of another's value preference; (iii) and decisions on behalf of others.

neural mechanisms of decision making

Neural mechanism of making a group decision under risk that influences on in-group members OTHER

how individuals evaluate the risk and the outcome when they should make a single agreement decision in a group that will influence every member's payoff regardless of individuals' decisions. For the first part of the experiment, we will measure the individual level of loss aversion which will be used as the parameter for controlling individual differences.

neural mechanisms of decision making

Neural mechanism of making a group decision that influences on out-group members OTHER

Human is decimated with other species by delegation of one responsibility. Although the person who has no-interests with the outcome of decision, they should make a delegated decision. Therefore, this decision has influences on others who are not part of the group. The third party punishment (Juries decision making) is one example of the decision made by a group influencing the out group members.

neural mechanisms of decision making

fMRI OTHER

For neuroimaging passes, the expected duration of each of the experimental protocols is about 1h30 for tasks 1 and 2 and about 2h for task 3. The maximum period foreseen for neuroimaging tests is 3 years and will start as soon as possible. Completion of the behavioral tests.

neural mechanisms of decision making

Eligibility Criteria

• Age: 20 Years - 30 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• healthy human adult
• normal vision

You may not qualify if:

• depression
• potential addiction to alcohol/ nicotine

Sponsors & Collaborators

• Hospices Civils de Lyon: lead

Study Sites (1)

CH le Vinatier

Bron, 69500, France

Location

Study Officials

• Caroline DEMILY, MD

  CH le Vinatier

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: March 24, 2017
• First Posted: March 30, 2017
• Study Start: January 31, 2015
• Primary Completion: July 18, 2016
• Study Completion: July 18, 2016
• Last Updated: November 28, 2017

Record last verified: 2017-11

Locations

FR (1)