PsPM-trSP2 dataset
===================

Repository Version: 2020.06.10

This dataset includes skin conductance response (SCR) measurements for each of 61 healthy unmedicated participants (30 males and 31 females, misprinted in Bach et al. 2015, aged 25.7 +/- 4.5 years) in response to the 45 least arousing neutral IAPS pictures, presented for 1 s each in 3 blocks, while listening to regular or random distractor sounds, as described in Bach et al. (2015). Inter stimulus interval was randomly determined as 7.65 s, 9 s, or 10.35 s. Each recording starts with a 2-minute baseline interval, preceded by a marker. For each of 3 blocks of stimuli, there is a marker corresponding to a "get ready" message on the screen. For each of the 2 breaks between blocks, there is a marker corresponding to a "start break" message on the screen. For each of the 45 stimuli, there is one marker. Overall, there are 51 markers.

--------------------------------------------------------------------------------
This repository is curated by the PsPM team, bachlab.org/pspm

--------------------------------------------------------------------------------
Dataset is described and used in following references:
- Dominik R. Bach (2014) A head-to-head comparison of SCRalyze and Ledalab, two model-based methods for skin conductance analysis. Biological Psychology, 103, pp 63-68. DOI:10.1016/j.biopsycho.2014.08.006
- Dominik R. Bach & Erich Seifritz & Raymond J. Dolan (2015) Temporally Unpredictable Sounds Exert a Context-Dependent Influence on Evaluation of Unrelated Images. PLoS One, 10:6, pp 1-14. DOI:10.1371/journal.pone.0131065

--------------------------------------------------------------------------------
File Structure:
-README.txt                // This document
-excludes.txt              // List of excluded subjects for specific publications
-+Data                     // Folder Containing all data files
 |-trSP2_windaq_XX_sn1.mat // 61 files holding measurements for SCR, ECG, and respiration
 |-trSP2_cogent_XX.mat     // 61 files holding key presses, IAPS information, and demographics

-------------------------------------------------------------------------------
Data Files:
- Files holding SCR and time markers, recorded with Windaq software.
  - Skin conductance (channel 1)
  - Event markers used for synchronization with Cogent files (channel 2)
- Files holding keyboard presses, and IAPS information, recorded with Cogent 2000 software. Also contains demographic (age, sex)

The data file name is composed of:
- trSP2        The dataset name
- windaq/cogent The type of data recorded (see above)
- XX           The subject number
- Y            The session number

Data are stored as .mat files for use with MATLAB (The MathWorks Inc., Natick, USA) in a format readable by the PsPM toolbox (bachlab.org/pspm). All Matlab files are saved in MATLAB 9.7.0 (R2019b) format.