wait to collect response

[Michiel Spape]

Hi,
If I'm understanding all of this correctly, I think the simplest way to do this would be to disconnect the audio stimulus and the event at 4800.
i.e.:
0 ms: Sound starts playing (SoundBuffer.Play). Also, log onset of sound (e.g. c.SetAttrib "SoundOnsetTime", Clock.read) 
[no response capturing]
4800 ms: some kind of marker (say, an invisible TextDisplay1) end action to terminate
Between 4800 and 5500 ms: at termination of TextDisplay1: 
If TextDisplay1.RESP <> "" then 
	SoundBuffer.Stop 'kills sound
	c.SetAttrib "RT", TextDisplay.RTTime - c.GetAttrib("SoundOnsetTime") 'saves RT based on soundbuffer onset time.
end If

So, in essence, I'd say that the easiest way to "hold off on collecting a response" would, essentially, be NOT to collect a response before the time. 
Best,
Mich

Michiel Spapé
Research Fellow
Perception & Action group
University of Nottingham
School of Psychology
www.cognitology.eu


-----Original Message-----
From: e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] On Behalf Of Matt Paffel
Sent: 27 October 2010 17:06
To: E-Prime
Subject: wait to collect response

Hello,

I have an experiment that runs some audio files and I'm having an
issue somewhat similar to what was discussed in this post:

http://groups.google.com/group/e-prime/browse_thread/thread/9d6274c8e8c69d6e/270bd8208b9e1d81?lnk=gst&q=wait+to+collect+response+#270bd8208b9e1d81

The experiment that I have runs audio files that are approximately
5500ms in length and the event that a participant needs to respond to
occurs at 4800ms. I wrote some script to adjust the real reaction time
from the RT of the object which works fine.

I also have the audio object set to terminate after a participant has
made a response thus moving them to the next trial.

The issue with the program is that if a participant responds prior to
the 4800 mark, the program jumps to the next trial. Turning the
objects  end action to "none" doesn't help because if a participant
responds prior to the 4800 mark, the RT collected is not for the event
under study.

My question is, is there a way to hold off on collecting a response
for an allotted amount of time to an object?

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