response recording during several displays

[Tobi]

Hi everyone,

I have the following, although sounding simple, hard to solve problem:

I want to show a stimulus for x ms and then to show a mask for y ms.
Participants should be able to respond for the x+y ms, i.e. during two
displays.

How can I do this?
Any hints are most welcome!

Cheers,
Tobias

[David McFarlane]

Tobias,

Hint --

1) Work through the Extended Input tutorial in Appendix C of the User's
Guide that came with E-Prime.

2) Then, set up your stimulus with extended input and follow that with
your mask.

E-Prime makes this simple once you know the basic technique shown in
Appendix C.

-- David McFarlane, Professional Faultfinder
"For a successful technology, reality must take precedence over public
relations, for nature cannot be fooled." (Richard Feynman, Nobel
prize-winning physicist)

[Sravani Vinapamula]

I think you can just give the duration for the response as the sum of the times of both slides.

 

 

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[David McFarlane]

Indeed, that is not a bad solution, and it is the first solution that
all my students come up with when I pose the question to them (and
was my own first solution). But for one thing it does seem
kludgy: The .RT appears sometimes in the stimulus column, sometimes
in the mask column, and when it appears in the mask column you have
to add in the duration of the stim. And if you do just that, your RT
will *not* include the time between the offset of the stimulus and
the onset of the mask. So to get it right when the response comes
during the mask you would need to calculate mask.RTTime -
stim.OnsetTime. Whew!

There has to be an easier way, and there is -- *Extended
Input*. Extended input cleanly, simply, and transparently takes care
of all of this. Please please do not overlook Appendix C.

-- David McFarlane, Professional Faultfinder

[Sravani Vinapamula]

Oh... Thank you! I will definitely look at the Appendix C