Most recently 'ENKI Experiment 3' was commissioned by Arts Catalyst for the show Interspecies. See documentation

Links and further reading

The IBVA consists of a sensor band recording 2 channels of brainwaves (EEG) with medical electrodes and a tiny bluetooth transmitter. IBVA's software does more than analyse, (upto 1920 samples per second) continuously - it visualises the delicate EEG from 0-280 Hertz per channel. In realtime you learn to intuitively affect your EEG (neurofeedback)
http://www.ibva.co.uk/

GSR or galvanic skin response is a measurement of skin conductivity from the fingers and / or palms.

Binaural beats or binaural tones are auditory processing artifacts, or apparent sounds, the perception of which arises in the brain independent of physical stimuli.

FFR or Frequency following response is the basis of brain wave entrainment, a naturally occurring phenomenon where the human brain has a tendency to change its dominant EEG frequency towards the frequency of a dominant external stimulus.

The muio interface is a modular system for sensing and controlling the Real World, from programmes such as Pure Data, MAX/MSP, SuperCollider, Processing or something you have written yourself.