rebound problem

[Tony Zuccolotto]

Philippe,

Assuming you are using a PortDevice for input there is no automatic
ignoring or filtering of debounce signals.  However you can do that in
script and log only those responses that you consider real, e.g. look in
the E-Basic Help under "InputMask.Responses (property)" for an example
of how to get at the raw response data.  You can then write script to
examine the RT or RTTime properties and likewise ignore responses that
arrived within N msec of each other.

To log the ones you want you would basically just use c.SetAttrib to put
them in the context and then call c.Log yourself to force a logging of
the current contents of the context.

Hope that helps,
Tony

*** DISCLAIMER: VIEWS EXPRESSED ARE MY OWN AND DO NOT NECESSARILY
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Anthony P. Zuccolotto
Vice President of Operations
Psychology Software Tools, Inc.
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> -----Original Message-----
> From: philippe.pinel [mailto:philippe.pinel at laposte.net]
> Sent: Wednesday, March 13, 2002 6:37 AM
> To: E-Prime
> Subject: rebound problem
> 
> 
> Hi,
> 
> I have a specific question about 'rebound' using response 
> button during a protocol. Indeed, when a subject gives a 
> response pressing a button, some mechanical rebound inside the 
> button are sometimes also considered by e-prime as button 
> press ! In consequence, signal of this rebound is recorded as 
> the subject’s response of the next trial. Does anyone know if 
> there is any parameters (in the response object properties 
> (slide, textdisplay) or in devices properties, for instance) 
> useful to avoid this problem ?
> 
> Thank you very much !
> 
> Philippe Pinel
> philippe.pinel at laposte.net
> SHFJ, Orsay, France
> 
> 
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