PsPM-SCRV_9 dataset
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Repository Version: 2017.02.14


This dataset includes skin conductance response (SCR) measurements for each of 22 healthy unmedicated participants (11 males and 11 females aged 24.7+/-4.5 years) participating in a visual detection task. Participants are requested to react by a keypress to a target visual stimulus (a red cross) embedded in a stream of distractors (white numbers). Stimuli are presented during 200ms and are spaced by a 800ms blank interval. A baseline period with distractors but no targets concludes the experiment. (This is in contrast to the methods description in Bach et al. (2010), according to which the baseline period was randomly either in the beginning or at the end of the experiment. This discrepancy was caused by an error in the code that controlled the experiment presentation.)

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This repository is curated by the PsPM team, pspm.sourceforge.net

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Dataset is described and used in following references:
- Dominik R. Bach & Guillaume Flandin & Karl J. Friston & Raymond J. Dolan (2010) Modelling event-related skin conductance responses. International Journal of Psychophysiology, 75, pp 349-356. DOI:10.1016/j.ijpsycho.2010.01.005

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File Structure:
-Readme.txt             // This document
-+Data                  // Folder Containing all data files
 |-SCRV_9_spike_XX.mat  // 22 files holding biosignal traces 
 |-SCRV_9_cogent_XX.mat // 22 files holding keyboard presses and trial information
 |-...

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Data Files:
Subject numbering is consistent with dataset SCRV_7's numbering.
- Files holding biosignal traces and time markers, recorded with CED spike software.
  - event markers used for synchronization with Cogent files, marker are set at text presentation onset (channel 1)
  - skin conductance(channel 2)
- Files holding keyboard presses trial information, recorded with Cogent 2000 software.

The data file name is composed of: 
 - SCRV_9       The dataset name
 - spike/cogent The type of data recorded (see above)
 - XX           The subject number

Data are stored as .mat files for use with MATLAB (The MathWorks Inc., Natick, USA) in a format readable by the PsPM toolbox (pspm.sourceforge.net). All matlab files are saved in MATLAB 8.6 (R2015b) format.