Hyperscanning refers to obtaining simultaneous neural recordings from interacting participants.

EEG hyperscanning is becoming increasingly popular since it allows researchers to explore the interactive brain with a high temporal resolution. We described and provided customized implementations of EEG hyperscanning setups using hardware and software from different manufacturers (paper). A proper EEG hyperscanning implementation should allow perfectly synchronized but independent recordings. This implies individual electrical Ground, Reference and power sources (batteries).

Pseudo-hyperscanning consists of the alignment of signals recorded from different brains at different times by using a physical signal common to the different recordings as a reference.

Sometimes the hyperscanning designs can be replaced by clever pseudo-hyperscanning set-ups. In the case of pseudo-hyperscanning designs using audio stimuli, combined EEG-auditory recording is a desirable feature since offline synchronisation is performed using the shared audio signal.