Press and release with joystick input

[Michiel Spape]

Ouch, that is one long concatenation - I'd think there's just some syntax error. Could be not, though, but then I'd assume that at that level of your experiment, the attribute LeftKey, for instance, cannot be read, at which point {-[LeftKey]} would read {-}. Is it always the same button? Also, just as a suggestion: I'm often too lazy to delete previous input masks, even if I go from keyboard to SRBox, for instance, but, as they are independently coded, I sometimes fail to set BOTH input masks to a new input, thus leading to confusing errors.

On a related topic, I was wondering whether it was a good idea to rigidly set allowable keys in the first place instead of, as David suggests, just doing {-ANY}. Of course, with Press Spacebar to Continue, there's a difference, but imagine you have a priming experiment with C (left) and M (presses), and for one reason or another, you participant is a bit dull and presses V (right next to C). If it is no allowable key, this is NOT scored as an error. In fact, your participant may then go on and press, a hundred msec later, the correct C key. In this scenario, it is impossible to find out in your data whether your participant was just slow for some reason (thus messing up your effect). If, however, you would have just used {ANY} allowable mask, you at least know afterwards they made an error. Anyway, just a thought.

Best,
Mich

Dr. Michiel M. Sovijärvi-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 enyhus
Sent: 11 November 2011 16:44
To: E-Prime
Subject: Re: Press and release with joystick input

Thanks for your response.  I've done a little more testing and the the
experiment does work if I use {ANY}{-ANY} as input, but I am still
confused why it did not work before.

Using the following code with the keyboard input works but with the
joystick input I get the folllowing error: The allowable response was
unrecognized: {-}.
Set in previous inline code:

c.SetAttrib "LeftKey", "1"
c.SetAttrib "LeftMidKey", "2"
c.SetAttrib "RightMidKey", "3"
c.SetAttrib "RightKey", "4"

Allowable in input:

{-[LeftKey]}[LeftKey]{-[LeftMidKey]}[LeftMidKey]{-[RightMidKey]}
[RightMidKey]{-[RightKey]}[RightKey]

Any ideas why this might be?

Erika

On Nov 10, 6:26 pm, David McFarlane <mcfar... at msu.edu> wrote:
> Erika,
>
> Stock reminder:  1) I do not work for PST.  2) PST's trained staff
> takes 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 -- this is pretty
> much their substitute for proper documentation, so make full use of
> it.  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...
>
> I have no experience with joysticks in E-Prime, so I am just talking
> off the top of my head.  And the error message that you specify looks
> like a design-time error rather than either a compile-time or
> run-time error, so you get it when you try to enter "{-}" into the
> Allowable field in the object's Property Pages E-Studio.
>
> So what happens if you instead use "{-ANY}"?  Does it work then?
>
> You see, {-} means a *press* of a *dash* character, and the SRBox
> cannot send a dash (it can send only the numbers 1-8).  (In fact, in
> this case the notation does not even indicate a release, if you
> wanted a relese of a dash character you would have to use {--}).  So
> to get a release response from a SRBox, you have to use the dash
> followed by which button you want to see released, e.g., {-1}, {-2},
> {-ANY}, etc.
>
> Just a reminder to anyone else who happens to tune in, you may find
> this general technique covered in the "{key} nomenclature" topic in
> the E-Basic Help facility.
>
> -- David McFarlane, Professional Faultfinder
>
> At 11/9/2011 04:31 PM Wednesday, you wrote:
>
>
>
> >I have created an experiment where I need to record both press and
> >release of responses.  It works when I use a keyboard as an input
> >device but when I use a joystick as input device (as this is how
> >EPrime recognizes our SRBox) I get the folllowing error: The allowable
> >response was unrecognized: {-}.  Is it possible to use press and
> >release with a joystick and if so, how do I specify the release?
> >Erika- Hide quoted text -
>
> - Show quoted text -

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