# PoTeC - Potsdam Textbook Corpus
> **NOTE**: This repository contains the data files for an eye-tracking-while-reading dataset (see description below). The **main repository** is a [GitHub repository][1] which contains a more *extensive documentation* including all the code that has been used to process that data, and instructions on how to *automatically download the data files* from this repository.
This repository contains the Potsdam Textbook Corpus (PoTeC) which is a natural reading eye-tracking corpus.
Four groups of participants (expert/beginner level students of physics and biology) read 12 short
texts taken from textbooks of physics and biology while their eye movements were monitored.
The final dataset contains the reading data for 75 participants each reading all 12 texts.
The study follows a 2x2x2 fully-crossed factorial design:
* _Factor 1:_ Study discipline of participant with the levels either physics or biology
* _Factor 2:_ Study level of participant with the levels either beginner or expert
* _Factor 3:_ Text domain with the levels either physics or biology
| | Physics | Biology |
|--------------|---------|---------|
| **Beginner** | 12 | 16 |
| **Expert** | 20 | 27 |
Both factors are quasi-experimental and manipulated between subjects.
The readers' text comprehension as well as their background
knowledge in the topics presented in the texts were assessed by multiple-choice questions.
## Data Overview
The data that was used to create the corpus and that was obtained during the experiments is made available in various stages.
The data is stored in respective sub folders each of which contains a README that provides more information
about the data and how to use it.
This repository only contains the large data files while the
## Technical set-up
The experiment was run with the following technical set-up:
| | **Setting** | **Value** |
|---------------------------|------------------------|--------------------------------------------------------------|
| | | |
| **Technical set-up** | Eye-tracking device | Eyelink 1000, dektop mounted camera system with a 35 mm lens |
| | Sampling rate | 1000 Hz |
| | Monitor size | 47.5x30 cm, 22 inch |
| | Monitor resolution | 1680x1050 pixels |
| | Eye-to-screen distance | 61 cm |
| | Eye-to-camera distance | 65 cm |
| | Experiment software | Experiment Builder software provided by SR Research |
| | | |
| **Stimulus presentation** | Background color | Black |
| | Font color | White |
| | Font size | 18 |
| | Font | Courier |
| | Stimulus size | On average 158 words shown on multiple lines on one page |
| | | |
| | | |
[1]: https://github.com/DiLi-Lab/PoTeC
