[Eeglablist] ERPs from multiple events?
Andrew Hill
andrewhill at ucla.edu
Thu Nov 13 16:04:34 PST 2008
hi folks - new to EEGLab; have a couple of questions.
i've got several Neuroscan .CNT files with embedded events notes
placed in the recording during a behavioral task, via Eprime.
discreet cue, stimulus, and response events are recorded, and there
are several of each type.
thus, a single behavioral "trial" has a cue code, a stimulus code, and
a response code - all as simple numerical codes, e.g. a cue (10) then
a stimulus (110) and then a response (100) for instance.
1) i have a question about creating ERPs for different combinations of
the codes.
i believe that ideally i want to create different sets of epochs, e.g.
grab a chunk of record 500ms before cue through 500 ms post
response. so - is it possible to create epochs using more than one
event type, or specify an epoch that ranges from one event type to
another? i've been messing around with the various options and i'm
not able to do this, so far.
2) i'm trying to associate channel locations with the .CNT file (or
it's resultant epocs) but attempts to specify a neuroscan .dat
(exported ascii version of the .CNT - just times ous) or a manual text
file is failing (command "eloc" not found) both fail.
any advice?
thanks,
andrew
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