Contextual influence on depression

This repository contains data, description scripts and analysis scripts for the publication

Contextual influence of reinforcement learning performance of depression: evidence for a negativity bias
Vandendriessche, Henri, Amel Demmou, Sophie Bavard, Julien Yadak, Cédric Lemogne, Thomas Mauras, and Stefano Palminteri https://doi.org/10.1017/S0033291722001593

Organisation of the repository

This repo is composed of: * Anonymized data (in format .mat) of the participants in the dataexpe directory. * An R script (datadepression.Rmd) to display the main results of the paper. * A simulation script (RichPoorSimulationsGitHub.m in Matlab) with plotting functions in the simulations directory.

General results

Run the datadepression.Rmd to get the main results and figures of the paper. Run the RichPoorSimulations_Github.m to get the simulated learning curves and learning rates.

Data

All behavioral data are stored in the raw matrix data.mat. The columns are ordered as follows:
* Learning phase * two sessions for each participants * files have the following naming pattern TestX_SessionX.mat

* COLUMN 1: subject number (2 3 4 6 7 8 9 10 11 14 15 16 18 20  24 26 28 30 31 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 60 61 63 64 65 66 67 68 69 70 71 72 73 75)
* COLUMN 2: session number (1-2)
    * 1: Session 1
    * 2: Session 2
* COLUMN 3: trial number (1:100)
* COLUMN 4: condition number (1-2)
    * condition 1: poor context
    * condition 2: rich context
* COLUMN 5: choice left/right (selection of the stimuli on the left or right)
    * -1: left
    * 1: right
* COLUMN 6: choice (0 bad, 1 good)
    * 0: uncorrect
    * 1: correct
* COLUMN 7: response time (ms)
* COLUMN 8: outcome (0 for -1 and 1 for 1)
    * 0: negative outcome (0pts)
    * 1: positive outcome (1pts)
* COLUMN 9: outcome observation time (ms)
* COLUMN 10: checktime (timestamp of the stimuli onset)
* COLUMN 11: checktime2 (timestamp of the outcome onset)

• Transfer phase
  • COLUMN 1 : subject number (2 3 4 6 7 8 9 10 11 14 15 16 18 20 24 26 28 30 31 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 60 61 63 64 65 66 67 68 69 70 71 72 73 75)
  • COLUMN 2 : trial number (1:112)
  • COLUMN 3 : symbol left (1:8)
  • COLUMN 4 : symbol right (1:8)
  • COLUMN 5 : time (timestamp on the onset of the symbols)
  • COLUMN 6 : choice
    • -1: left
    • 1: right
  • COLUMN 7 : response time (ms)