defining a 'fixation point' in audition

["ftordini@xxxxxxxxx" <ftordini@xxxxxxxxx>]

Dear list members,
I am in the process of redesigning a test dealing with attention and auditory 
saliency but then I have a doubt about how to define, and possibly control, the 
'fixation point' (in the case of sound stimuli).
I am using headphones, so head-tracking is not an option, I believe. 

I also have thought that, giving credit to a supramodal model of attention, I 
could provide a visual fixation point (a cross on the screen) but this would be 
a fallback solution since I would like to keep it unimodal at this stage (and I 
am addressing stimulus-driven attention).  


This may sound as a very naive question to most of you, but I am turning it to 
the community since I always got precious comments and feedback in the past.

Best regards
Francesco

-- 
Francesco Tordini      â skype francesco.tordini
PhD Student             â http://www.cim.mcgill.ca/sre/personnel/  

Centre for Intelligent Machines and
Department of Electrical and Computer Engineering
McGill University
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