Joystick direction as response & RT

[David McFarlane]

Nick,

Fair question, and sadly the answer is no, I have not yet had any 
experience whatsoever with modern joysticks in E-Prime.  And if the 
past is any guide, my saying that means that, almost certainly, one 
of the labs here is just about to bring me such a project...

But hey, as I keep saying, that's what PST Web Support is for, so 
please contact them post haste at 
http://support.pstnet.com/e%2Dprime/support/login.asp , they strive 
to respond to all requests in 24-48 hours.  And if you do get an 
answer from PST Web Support, please do us all the favor of posting 
their reply back here.

Regards,
-- David McFarlane, Professional Faultfinder


At 2/2/2010 11:05 AM Tuesday, Nick wrote:
>Hi David,
>
>Thanks for the interesting suggestion.  I think we're kinda locked
>into trying to figure something out with the existing joysticks we
>have before buying other equipment though. Also, I am not so sure that
>I could pull off the the custom cable and connections in the near
>future having never done anything like that before.  The frustrating
>thing is that my colleague and I have our procedure ready to go except
>for this data recording issue. Would you have any suggestion of in-
>line script that might be able to accomplish the recording of first
>direction & RT by any chance?
>
>On Feb 1, 3:21 pm, David McFarlane <mcfar... at msu.edu> wrote:
> > This old geezer cannot quite resist chiming in with some useless
> > thoughts.  If I only wanted to detect when a subject pushed a
> > joystick forward or backward (and not how far or fast), then I would
> > go to eBay and purchase a simple old four- or eight-position Atari or
> > Commodore style joystick, or even better, an arcade game joystick
> > that used good quality micro switches.  These gave simple off-on
> > switch closures when the user pushed the stick to a side or
> > corner.  Then I would build a custom cable to go from the appropriate
> > switches directly to an old parallel printer port or an added digital
> > I/O card.  Then in E-Prime I would use the Port device, or the
> > ReadPort function from script.
> >
> > Ah for the days when the electronics were laid bare and the operating
> > system got out of our way...
> >
> > -- David McFarlane, Professional Faultfinder
> >
> >
> >
> > >I can certainly forgive it, but unfortunately that's not the problem.
> > >I can get E-Prime to recognize the joystick and record certain
> > >responses (e.g. button click and concomitant RT), but I can't get it
> > >to record the direction of first movement and the RT of that response.
> >
> > >On Feb 1, 11:00 am, liwenna <liwe... at gmail.com> wrote:
> > > > I hope you can forgive me if this is is a really silly question but:
> > > > did you add a 'joystick' to the devices in the experiment properties?
> > > > (e-prime logo at the top of your experiment tree).
> >
> > > > On Feb 1, 5:15 pm, Nick <ndla... at gmail.com> wrote:
> >
> > > > > Hi everybody,
> >
> > > > > I am trying to interface a Logitech Attack3 joystick with E-Prime. So
> > > > > far I have only had limited success although I think it should be
> > > > > pretty simple to do what I need.
> >
> > > > > On each trial, the participants will have to respond to the final
> > > > > slide with a forward or backward movement of the joystick (depending
> > > > > on the trial type). All I need is 1) for E-Prime to record the
> > > > > Reaction Time of when the the push or pull of the joystick is
> > > > > initiated (in correspondence to the onset of the final slide for each
> > > > > trial) and 2) for the direction (up or down) of the first joystick
> > > > > movement to be recorded to the data file.
> >
> > > > > It seems like this should be pretty standard, but I can't find any
> > > > > code that addresses it. Is there some code you might know of to do
> > > > > this type of thing?
> >
> > > > > Also, I did read through previous posts attempting to solve this
> > > > > problem with continuous sampling of the joystick X-Y coordinates, but
> > > > > I couldn't get the posted code to work out.  Although I don't like
> > > > > this solution quite as much for my purposes, any help with how to
> > > > > continuously sample the X-Y coordinates would also be very
> > > > > appreciated.
> >
> > > > > Thanks!
> > > > > Nick

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