placing markers in wav files?

[Tony Zuccolotto]

Carol,

There is no way currently in E-Prime to automatically adjust an RT based
on the offset of a word in the file.

To do this you would probably have to list the word offsets as an
attribute and then insert some script at the end of the trial to adjust
the RT, e.g. 

	If Stimulus.RT > c.GetAttrib( "WordOffset") Then
		Stimulus.RT = Stimulus.RT - c.GetAttrib("WordOffset")
	Else
		' Responded before the word was presented
		Stimulus.RT = 0
	End If

Hope that helps.

Tony

*** DISCLAIMER: ALL VIEWS EXPRESSED ARE MY OWN AND DO NOT NECESSARILY
REFLECT THOSE OF PSYCHOLOGY SOFTWARE TOOLS *** 

Anthony P. Zuccolotto
Vice President
Psychology Software Tools, Inc.
2050 Ardmore Boulevard
Suite 200
Pittsburgh, PA 15221-4610
Phone     412-271-5040
FAX       412-271-7077
Email     anthony.zuccolotto at pstnet.com
Internet  http://www.pstnet.com

> -----Original Message-----
> From: Carol Anne Miller [mailto:cam47 at psu.edu]
> Sent: Wednesday, July 09, 2003 10:44 AM
> To: eprime at mail.talkbank.org
> Subject: placing markers in wav files?
> 
> Hi, I am a novice Eprime user, although I have been lurking on this
> mailing
> list for some time.  I haven't found an answer to my question in the
> documentation, website, or the archives of the mailing list, so I hope
> someone out there can help.
> 
> I am collecting response times to sound files.  In the experiment I am
> working on, the subjects' task is to listen to a sentence and press
one
> button if it is grammatically correct, and another button if it is
> incorrect (I'm using the PST Serial Response Box).  I have this
experiment
> working all right, but I would like to refine it:  I would like to
measure
> the RT from the onset of a crucial word in the sentence, rather than
from
> the onset of the sound file.  Is there a way to either a) place a
marker
> in
> the sound file that will tell Eprime to start measuring RT?  or b)
tell
> Eprime to start measuring RT at a certain point , i.e., file onset +
xxx
> ms?  The crucial point is different for each sentence.
> 
> It's not essential to do this, but it would be nice.
> 
> If anyone can direct me to an appropriate resource, or has a solution
to
> this problem, please let me know.
> Thank you!!
> Carol
> 
> 
> 
> 
> ++++++++++++++++++++++++++++
> Carol Miller, Ph.D.
> Dept. of Communication Sciences & Disorders
> Penn State University
> 115-B Moore Building
> (814) 865-6213
> cam47 at psu.edu
> ++++++++++++++++++++++++++++
>