Cognitive Load Assessment Through EEG: A Dataset from Arithmetic and Stroop Tasks

This dataset contains EEG recordings that measure cognitive load in individuals performing arithmetic and Stroop tasks. The dataset aims to facilitate the study of mental stress and cognitive load through EEG analysis.

Demographics:
- Number of Subjects: 15 (8 males and 7 females)
- Average Age: 21 years

Device and Data Collection:
- Device: OpenBCI EEG Electrode Cap Kit with Cyton board (8 channels)
- Channels: Fp1, Fp2, F7, F3, FZ, F4, F8, C2 (10-20 system)
- Sampling Rate: 250 Hz
- Duration: 1-2 minutes per session

Tasks and Levels:
1. Stroop Test Dataset:
- Natural Level: Baseline brain activity
- Low-Level Stress: Simple Stroop questions within 10 seconds
- Mid-Level Stress: Standard Stroop questions within 10 seconds with visual interference
- High-Level Stress: Complex Stroop questions with a 20-second limit

2. Arithmetic Test Dataset:
- Natural Level: Baseline brain activity
- Low-Level Stress: Simple arithmetic within 10 seconds
- Mid-Level Stress: Slightly more complex arithmetic within 20 seconds
- High-Level Stress: Complex arithmetic within 20 seconds

File Format:
- Data files are in plain text format (.txt).

Using the Dataset:
- Each .txt file contains EEG data corresponding to a single session of either the arithmetic or Stroop task at one of the four cognitive load levels.
- The first line of each file may contain metadata specific to the recording (e.g., subject ID, condition).
- Subsequent lines contain EEG signal values recorded at the specified sampling rate.

Directory Structure:
/raw_data/
/Arithmetic_Data/
- natural-1.txt to natural-15.txt
- lowlevel-1.txt to lowlevel-15.txt
- midlevel-1.txt to midlevel-15.txt
- highlevel-1.txt to highlevel-15.txt
/Stroop_Data/
- natural-1.txt to natural-15.txt
- lowlevel-1.txt to lowlevel-15.txt
- midlevel-1.txt to midlevel-15.txt
- highlevel-1.txt to highlevel-15.txt