debounce time

[Michiel Spape]

Hi,
I think that rather depends on your button box, how it is connected, and so forth. That is, if it were connected as a keyboard, you could change settings (or at least, one used to be able) in the BIOS. It's basically the same if you press a spacebar long enough: you can see a short pause before it starts giving more and more spacebars (until the annoying "sticky keys" window pops up! Arg!). This is what you might call the "debounce" time. 
Anyway, one way would be to dump a little slide in between your two slides, which has as an allowable key the unpress (-) version of the same thing you have in the first slide. Thus, this slide would be terminated upon unpressing same key - which should do the trick unless your button box sends 1010101 instead of 111111 (i.e. no voltage change). 
Just a thought, but perhaps it helps.
Best,
Mich

Michiel 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 Tobias
Sent: 14 July 2011 11:37
To: E-Prime
Subject: debounce time

Dear E-Prime community,

I have just received a nice self-made buttonbox with three buttons
that can be attached to a parallel port. THus I have very good timing
of RTs for my experiments now :)

However, there seems to be a problem with the bouncing of the keys.
Single key presses cause several signals in a row. That is, if I have
two consecutive slides with a duration of "-1", one key press is
enough to terminate both slides.

A collegue of mine said that in the experimental software
'Presentation', a debounce time can be specified so that such double
responses are not possible.

Is there any way of doing so in E-Prime?

Best,
Tobias

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