PsPM-AOB dataset
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Repository Version: 2020.01.15

This dataset includes eye tracker (including pupillometry) measurements from auditory oddball tasks with ITIs of 1, 2, and 3 s (in groups 1, 2, and 3 respectively). Also included are task information, keypress responses, keypress response times and key correctness for each of 66 healthy unmedicated participants (40 females and 26 males aged 24.2+/-3.9 years) participating in auditory oddball tasks. Stimuli consist of sine tones (50-ms length; 10-ms ramp; 440 or 660 Hz).

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

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Dataset is described and used in following references:
- Christoph W. Korn & Dominik R. Bach (2016) A solid frame for the window on cognition: Modeling event-related pupil responses. Journal of Vision , 16:28, pp 1–16. 

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File Structure:
-README.txt               // This document
-+Data                    // Folder Containing all data files
|-AOB_pupil_xx_snY.mat    // 66 files holding measurements for eye tracking
|-AOB_cogent_xx.mat       // 66 files holding key presses, task information, and demographics

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Data Files:
- Files holding eyetracking and time markers, recorded with Eyelink software.
  - Pupil left (channel 1)
  - Pupil right (channel 2)  - Screen geometry for conversion from pixels to mm.
  - Event markers (channel 3) used for synchronization with Cogent files, markers are set at stimulus presentation onsets (Marker 1 for standards and Marker 2 for oddballs).
  - Gaze_x left (channel 4)
  - Gaze_y left (channel 5)
  - Gaze_x right (channel 6)
  - Gaze_y right (channel 7)
- Files holding:
  - Keyboard presses in response to oddballs (no key presses were required for standards), and task information, recorded with Cogent 2000 software.
  - Demographic (age, sex).
  - Group membership (i.e., ITI information).
  - Screen geometry (screen size and screen-subject distance in mm) for conversion of gaze coordinates from pixels to mm.

The data file name is composed of:
- AOB          The dataset name
- pupil/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 (R2019b) format.