Related Experiment Video
Updated: Jul 15, 2026
Using Electroencephalography Measurements and High-quality Video Recording for Analyzing Visual Perception of Media Content
Published on: May 26, 2018
Effect of eye-blinks on a self-paced brain interface design.
Ali Bashashati1, Borna Nouredin, Rabab K Ward
1Department of Electrical and Computer Engineering, University of British Columbia, 2332 Main Mall, Vancouver, BC, Canada. alibs@ece.ubc.ca
This study evaluated electroencephalogram (EEG)-based brain interfaces, comparing two designs for handling eye-blink artifacts. One design, LF-ASD-V5, showed slightly reduced true positive rates but maintained functionality, suggesting it can manage artifacts without external electrooculogram (EOG) detection.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Signal Processing
Background:
- Electroencephalogram (EEG)-based brain-computer interfaces (BCIs) offer potential for assistive technology.
- Eye-blink artifacts are a common source of noise in EEG data, potentially compromising BCI performance.
- Existing methods often require separate artifact detection, adding complexity.
Purpose of the Study:
- To evaluate the performance of a self-paced brain interface (LF-ASD) when eye-blink artifacts are present in the EEG data.
- To compare two designs of the LF-ASD in their ability to handle eye-blink artifacts.
- To determine if artifact handling can be integrated without compromising overall functionality.
Main Methods:
- Two low frequency-asynchronous switch designs (LF-ASD-V4 and LF-ASD-V5) were evaluated using offline EEG data from eight subjects.
- Performance was assessed across three conditions: excluding artifacts, inactivating output during artifacts, and including all data with continuous output.
- True positive rates (TPRs) were compared at a 1% false positive rate (FPR).
Main Results:
- LF-ASD-V5 achieved a TPR of 40.5% under continuous output with eye-blink artifacts included (case c).
- LF-ASD-V4 achieved a TPR of 42.4% when output was inactivated during eye-blink artifacts (case b).
- A slight decrease in TPR for LF-ASD-V5 was observed when eye-blinks were included in the analysis compared to LF-ASD-V4 with inactivated output.
Conclusions:
- LF-ASD-V5 demonstrates improved functionality by remaining operational at all times, handling eye-blink artifacts more effectively than LF-ASD-V4.
- The integrated artifact handling in LF-ASD-V5 offers a practical solution, potentially eliminating the need for separate electrooculogram (EOG) recording.
- Accepting a minor reduction in TPR allows for a more robust and continuously functional EEG-based brain interface.
