GARD_EEG

GARD EEG Dataset - neuroNicle FX2 Wireless EEG Data (2019-2023)

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📊 Dataset Summary

• Period: 2019 - 2023 (5 years)
• Total Files: 10,539 files
• Subjects: ~2,663 subjects (based on Excel metadata)
  • ⚠️ Note: Excel list is incomplete, actual number may be higher
• Device: Laxtha neuroNicle FX2 (wireless EEG headset)

📁 Files by Year

Year	Number of Files
2019	2,134
2020	2,399
2021	1,947
2022	2,095
2023	1,964

🧠 Channel Configuration (7 channels)

EEG Channels (2)

• CH1: Fp1 - Frontal Left EEG
• CH2: Fp2 - Frontal Right EEG

Bio Channels (3)

• CH4: PPG - Photoplethysmogram
• CH5: sdPPG - 2nd derivative PPG
• CH6: HeartInterval - RR interval

Misc Channels (2)

• CH3: PowerSpectrum - FFT-derived (updated every 2s)
• CH7: PacketCounter - Data packet counter

Recording Parameters

• Reference: Earlobe (monopolar)
• Sampling Rate: 250 Hz
• Hardware Filter: 3-41 Hz bandpass (built-in)

🎯 Task Types (3 protocols per subject)

1. BEAM (*_b_raw.txt)

• No event file
• Duration: ~5-10 minutes

2. Sensory (*_s_raw.txt)

• No event file
• Duration: ~5-10 minutes

3. Attention (*_a_raw.txt + *_a_raw.event)

• Event file included
• Duration: ~5-10 minutes
• Events: Stimulus presentations + Response times

📌 Event Types (Attention task only)

Stimulus Events

• St1, St2, St3, ... (numbered stimuli)
• Stimulus types: "back.wav", "odd.wav" (oddball paradigm)

Response Events

• RT: Reaction time markers

Example (k_001_oid_5740 attention task)

• Total events: 390
• Duration: 325 seconds (~5.4 minutes)

📝 File Naming Convention

Pattern: [gender]_[seq]_oid_[oid]_[task]_[device]_[session]-[date]_[time]([duration])_([channels])_[suffix]_raw.[ext]

Example:

k_001_oid_5740_atten_q1n8_id612-2019y-11m_08d_11h_08m_52s(5m_25s)_(l115_r118)_a_raw.txt

Components:

• k_001: Subject sequence
• oid_5740: Object ID (subject identifier)
• atten: Task type (attention)
• 2019y-11m_08d: Date
• (5m_25s): Duration
• (l115_r118): Channel values
• a_raw.txt: Attention task raw data

📋 Metadata

• Excel file: EEG_list_2019-2023.xlsx (2,663 records)
• Columns: 측정년도, k_no, object_idx (OID), Gender, Birth, Age, Device, Device_ID, BEAM파일명, Sensory파일명, Attention파일명

⚠️ Notes

• Attention task is the only protocol with event markers
• Excel metadata is incomplete (some OIDs in server files not in Excel)
• Data is already preprocessed (txt format) with hardware filtering applied
• Each subject typically has 3 files (beam, sensory, attention)

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Written by Bohee with Claude Code