Repeated key/mouse presses

[Krishane Patel]

Hello

I'm designing a perceptual experiment to test how accurate we are at listening and remembering music. Participants will respond after listening to music by tapping/clicking the mouse (whichever would be easier to run) to resemble what they believed the rhythm of the music was and its tempo.

So I would need multiple responses and would need to record the time between presses.

There is no "correct answer" as it's a judgment task, and wanted to compare beginner and experts judgements.

I have set the max count to the desired limit, but E-prime ends up only recording 4/5 out of the 20 presses.

Any ideas how to get around this?

Thanks
Kris

[Cognitology]

Hi,
I have no idea why it fails to capture more than 4/5 responses, but in any
case, the easier way to get around it is not to use multiple answers. You
just set the audio running a time X, collect its onsettime, then start a
list with a single wait object which will then collect the RTTime. Go to
user script, declare
DIM mylong as long
Enter a single Inline thingy after your waitobject:
c.SetAttrib "ITI", wait.RTTime - mylong
mylong = wait.RTTime

Voila.
Can be done a bit more elegantly, so you don't save the first ITI (given
that there's no previous one), but you could always filter these out later
on.
Best,
Michiel

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[David McFarlane]

Krins,
I am a bit puzzled about how you get it to record more than 1
response, but not all the responses. Anyway, as another approach see
the "Multiple Response Collection" example downloadable from the PST website.

-----
David McFarlane
E-Prime training
online: http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter: @EPrimeMaster (https://twitter.com/EPrimeMaster)

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