<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Hi CL,<br>
<br>
I think you just need to use the {-key} format to detect releases,
e.g.<br>
{-1}{-2} <br>
for releases of keys 1 and 2, vs <br>
12<br>
which indicates presses only.<br>
<br>
You might consider enabling the device to detect both presses and
releases - having designed a vaguely similar experiment myself I
found it useful to detect that a participant had pressed the button
before a stimulus onset, and also that no release had occurred
during a short interval before that stimulus started. This way if
they pressed but failed to hold a key, it would display an error
message and restart the trial. At least in our design, piloting
suggested this happened often enough it was worth the extra work to
implement.<br>
<br>
all the best,<br>
DavidV<br>
<br>
<div class="moz-cite-prefix">On 03/04/2014 11:43, Clément Letesson
wrote:<br>
</div>
<blockquote
cite="mid:3cc66cfd-cd9b-4f19-a950-4fce6d7d63f2@googlegroups.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi there,
<div><br>
</div>
<div>I designed an experiment where participants have to execute
different actions after watching a video. Participants have to
keep their index fingers pressing two specific buttons on a
response box. I want to record the reaction time from when the
video stops to the button release but it does not work.</div>
<div><br>
</div>
<div>I specified that "Button release" was the only response
collection mode but when trying to apply the configuration to
the slide where participants have to execute the actions, I
get an error message: "value contains presses and device is
not accepting presses" and I do not really get why this is
happening ... It appears I can not make eprime record the RT's
from the button releases.</div>
<div><br>
</div>
<div>Any insights/advice/explanations ?</div>
<div><br>
</div>
<div>All the best and thanks in advance,</div>
<div><br>
</div>
<div>CL</div>
</div>
-- <br>
You received this message because you are subscribed to the Google
Groups "E-Prime" group.<br>
To unsubscribe from this group and stop receiving emails from it,
send an email to <a moz-do-not-send="true"
href="mailto:e-prime+unsubscribe@googlegroups.com">e-prime+unsubscribe@googlegroups.com</a>.<br>
To post to this group, send email to <a moz-do-not-send="true"
href="mailto:e-prime@googlegroups.com">e-prime@googlegroups.com</a>.<br>
To view this discussion on the web visit <a
moz-do-not-send="true"
href="https://groups.google.com/d/msgid/e-prime/3cc66cfd-cd9b-4f19-a950-4fce6d7d63f2%40googlegroups.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/e-prime/3cc66cfd-cd9b-4f19-a950-4fce6d7d63f2%40googlegroups.com</a>.<br>
For more options, visit <a moz-do-not-send="true"
href="https://groups.google.com/d/optout">https://groups.google.com/d/optout</a>.<br>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
David Vinson, Ph.D.
ESRC Research Fellow
Cognitive, Perceptual and Brain Sciences Research Department
University College London
26 Bedford Way, London WC1H 0AP
Tel +44 (0)20 7679 5311 (UCL internal ext. 25311)</pre>
</body>
</html>
<p></p>
-- <br />
You received this message because you are subscribed to the Google Groups "E-Prime" group.<br />
To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:e-prime+unsubscribe@googlegroups.com">e-prime+unsubscribe@googlegroups.com</a>.<br />
To post to this group, send email to <a href="mailto:e-prime@googlegroups.com">e-prime@googlegroups.com</a>.<br />
To view this discussion on the web visit <a href="https://groups.google.com/d/msgid/e-prime/533E860B.8040705%40ucl.ac.uk?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/e-prime/533E860B.8040705%40ucl.ac.uk</a>.<br />
For more options, visit <a href="https://groups.google.com/d/optout">https://groups.google.com/d/optout</a>.<br />