Dear all
Sorry if this has been answered somewhere before...........
We are in the process of designing an event-related study where
subjects are played 3-5 second bursts of white noise during
which they may or may not hear a brief fragment of speech. They
then press a button if they hear a voice. What we are particularly
interested in is the false positives - ie. when they report hearing a
voice but no voice was present. Our critical event type is therefore
"imagined voice". The problem with this, of course, is that we
cannot specify the time at which this happened (because it only
happened in the subject's head). We know it happened within the
3-5 second white noise burst but that is all.
We will be comparing these imagined events with real events (ie
when subjects hear a voice that is actually present) - these
obviously CAN be pinned down in time.
I was wondering if anyone had any thoughts about the feasibility
of this experiment and advice as to how we should go about
modelling the imagined events.
Many thanks for your help
Rebecca
Dr Rebecca Elliott
Neuroscience and Psychiatry Unit
Room G907, Stopford Building
University of Manchester
Oxford Road
Manchester
M13 9PT
Phone: 0161 275 7433
Fax: 0161 275 7429
e-mail: [log in to unmask]
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