Re: brainwaves - NOT

Peter Currie (
Thu, 06 Aug 1998 17:43:07 +1200

>>I have some acquaintance with EEG signal processing, brainwave coherence
>>analysis, and attempts to correlate these to anything like cognitive
states or
>>mental command. I believe it's possible in theory, and maybe in commercial
>>practice, but I'm unaware of ANY (non-classified anyway) success stories.
One to two dimensions of control can relatively easily be obtained from EEG.

>>I've experience this IBVA system demo'd several occasions over the past
>>several years.
>>I have never been able to see ANY response modality that was:
>>(a) reliably repeatable; and
>>(b) repeatably correlated with ANY form of conscious intent / user cognitive
I have IBVA system - the key is that it takes some time to learn to control
EEG - but easy with practice.

>>The most I've seen is an experienced biofeedback practitioner acheiving a
>>"general direction" of response flavor over several minutes drift; nothing
>>like discreet event evoked responses or feedback.
But can be done. An event evoked potential called the p300 can reliably be

>>Thus, the overall brain wave (EEG) state of affairs, with some post-
>>processing, simply is fed as an input into various media results. I have
>>never seen it be more than, from a human factors standpoint a generally
>>chaotic or almost random influence. Overall EEG frequency-related data WILL
>>affect output, but merely that, is NOT A USEFUL nor reliable
>>input/control/feedback methodology.
You might want to check out the _Waverider_ device... Simple midi out from
eeg or ecg

>>Maybe IBVA's technology has improved since my experiences... anyone out
>>on the list have another opinion? If it had, I'd think we see it in the
>>extensive scientific literature citations, etc. etc. and we haven't as yet.
IBVA's tech hasn't changed much. I'm using MindSet unit. 16 channels of eeg
or ecg
Basic audio/visual feedback modalities are provided as well as a
multi-channel, multi-parameter
threshold definition structure.
Output of actor's & audience's physiological interaction in real time...
The relationship becomes the audio/visual world

Peter Currie
Theatre & Film Studies Dept.
University of Canterbury
Private Bag 4800
PH:ΚΚ +64 3 3642987 Ext. 7291
FAX:ΚΚ +64 3 3642773