Recording presses and releases from a serial response box

[River]

FYI for others who aren't clever enough to check the PST site first...
(apologies)

To get the SRBox to register presses and releases you have to: go to
Edit, Experiment, Devices, and edit what it records. Then in Allowable
responses add the key as you normally would e.g. 1 as well as {-1}
which denotes presses with the 1 and releases with the {-1} . Then
click on the advanced button and increase the MaxCount to at least 2.

Also, just from my experience, if you're trying to get timing between
presses, bear in mind that responses may occur during fixations and
necessarily during images so these settings should probably be applies
to fixation screens too.

Thanks for the pointers David.

On Dec 3, 5:06 pm, David McFarlane <mcfar... at msu.edu> wrote:
> River,
>
> Standard reminder:  1) I do not work for PST.  2) PST's trained staff
> really does like to take any and all questions athttp://support.pstnet.com/e%2Dprime/support/login.asp, and they
> strive to respond to all requests in 24-48 hours.  So don't be shy
> there.  3) If you do get an answer from PST Web Support, please
> extend the courtesy of posting their reply back here for the sake of others.
>
> That said, here is my take ...
>
> At 12/3/2009 09:23 AM Thursday, you wrote:
>
> >I've been perusing the E-Basic Help pages...just to specify, ideally I
> >want this record to appear in the data file, not in a msg box. Is that
> >possible?!
>
> Yes.  Please download the
> <http://www.pstnet.com/e-prime/support/samples.asp?Mode=View&SampleID=43>Multiple
> Response Collection sample from the PST web site.
>
> >On Dec 3, 12:26 pm, River <ll... at medschl.cam.ac.uk> wrote:
> > > I see that you can get the srbox to record presses and releases
> > > however I can't see where these two discrete events are recorded in
> > > the data files when this setting is used-can anyone enlighten me?
>
> By default, only one response gets recorded in the .edat file.  If
> you have both presses & releases enabled, and a Max Count of 1 (the
> default), then you will record only the press.  If you set Max Count
> to 2, then you will record only the release.  To record more, please
> see the answer above.
>
> > > Secondly, is there a way to program the software to start a stop watch
> > > when a certain srbox button has been pressed (or released) and stop it
> > > when its pressed again (or released) while simultaneously continuing
> > > with the experiment (namely showing a series of pictures which are to
> > > be responded to using a different srbox key press.) I.e. is it
> > > possible to time the duration between a specific set of key presses?
>
> Yes, it is possible, and many other things besides.  It will require
> some inline script, and the more intricate your design, the more
> script you will need.
>
> -- David McFarlane, Professional Faultfinder

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