Open-source concealed EEG data collection for Brain-computer-interfaces - neural observation through OpenBCI amplifiers with around-the-ear cEEGrid electrodes

ABSTRACT

Observing brain activity in real life offers exciting possibilities like the support of physical health, mental well-being, and thought-controlled interaction modalities. The development of such applications is, however, strongly impeded by low accessibility to research-grade neural data and a lack of easy-to-use and comfortable sensors. To overcome these challenges, we present the cost-effective adaptation of concealed around-the-ear EEG electrodes (cEEGrids) to the open-source OpenBCI EEG signal acquisition platform. The system combines publicly available electronic components with 3D-printed parts, forming an easily replicable recording system for prolonged use and flexible application development. To demonstrate the system’s feasibility, experimentally induced changes in visual stimulation and mental workload are replicated. Lastly, a novel application area is investigated, the observation of flow experiences through observation of temporal Alpha power changes. Support for a link between temporal Alpha power and flow is found, indicating an efficient engagement of verbal-analytic reasoning with intensified flow levels.

KEYWORDS:

• Concealed EEG
• OpenBCI
• cEEGrid
• Brain-Computer-Interface
• wearables

Data availability statement

Participants of this study did not agree for their data to be shared publicly, so supporting data is not available.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Participant consent

The authors of this document confirm that every participant of this experiment has given written consent to the inclusion of material pertaining to themselves, that they acknowledge that they cannot be identified via the paper; and that their data is completely anonymized.

Health and safety

The authors of this document confirm that all mandatory laboratory health and safety procedures have been complied with in the course of conducting any experimental work reported in this paper. The authors also ensure that this paper contains all appropriate warnings on any hazards that may be involved in carrying out the described experiments or procedures, or that may be involved in instructions, materials, or formulae.

Additional information

Funding

This work has been conducted without any external funding.