external screen in E-prime

[Paul Gr]

Hi Dieter,

Although Windows allows you to run the EPrime script on the primary screen
and keep the second half of the desktop (with EStudio) visible on the second
monitor at the same time, there are a few drawbacks when using this
configuration:
1) the EPrime script on the primary monitor will abort immediately when you
accidentally activate one of the mouse buttons on the second screen
2) all non-ERun applications are significantly slowed down when the script
is started (i.e. run with lower priority), so there might be situations
(depending on your hardware and script) where the debug output windows is
not up-to-date.

One possible alternative is to use a separate system to display feedback to
the experimenter. For example, you could use a serial connection (RS232) and
an old fashioned TTY terminal to send textual messages by using some
straightforward inline scripts. When a second PC or laptop is at hand, you
could also use a null-modem cable and a terminal emulator program (such as
HyperTerminal) to realize such a configuration. We are currently looking
into some Bluetooth enabled palmtops or PocketPC’s to do the same thing
wireless.

We also performed some preliminary tests with a custom made library (DLL or
COM object), which was used to create a network enabled connection to
another PC. The software we tested also supported multiple connections
between several subject PC’s to a single monitoring PC.

And there is also a poor man's solution: in some cases it is possible to put
a mask on the subject monitor to hide part of the display. The hidden
section can be used to display extra information that is not visible for the
subject. (You will need an old fashioned VGA splitter or a multiple-output
VGA card which supports cloning the primary screen.)

best,
Paul Groot
Vrije Universiteit Amsterdam


>From: "David Hairston" <dhair at wfubmc.edu>
>To: "Dieter Vanderelst"
><Dieter.Vanderelst at UGent.be>,	<eprime at mail.talkbank.org>
>Subject: RE: external screen in E-prime
>Date: Thu, 31 Mar 2005 11:02:33 -0500
>
>We use multiple monitors in our lab also, so that the experiment can get
>feedback as to what is going on.
>If you have multiple monitors, each fed via a different video output
>(not just splitting a line), then the E-Prime experiment window will run
>on the monitor designated as "primary" under windows Display Properties.
>
>The second window will keep the E-studio editor open, so we use this for
>the experimenter to view, using the debug.print command to print data to
>the debugger frame.
>
>For example, if you want to know their accuracy of a response to StimX,
>use:
>Debug,Print StimX.ACC
>
>And so on.
>
>Hope this is helpful, let me know if you have other questions.
>
>Dave
>
>
>
>W. David Hairston
>Neurobiology and Anatomy
>
>Wake Forest University School of Medicine
>Winston-Salem, NC 27157
>(336) 716-4481 (lab)
>http://www.wfubmc.edu/nba/XMODAL/
>
>-----Original Message-----
>From: eprime at mail.talkbank.org [mailto:eprime at mail.talkbank.org] On
>Behalf Of Dieter Vanderelst
>Sent: Thursday, March 31, 2005 10:45 AM
>To: eprime at mail.talkbank.org
>Subject: external screen in E-prime
>
>Dear,
>
>I'm currently working on an experiment in E-prime. In this experiment I
>would
>like  to present some info to the experimenter on each trial. So I was
>wondering
>whether  E-prime supports multiple displays. And whether it is possible
>to
>present different stimuli on these displays.
>
>Could anybody help me?
>
>With Regards,
>Dieter Vanderelst
>Student at the University of Ghent, Belgium.
>--
>Personal web pages:
>www.boa-web.org
>www.leonardo.boa-web.org
>
>
>
>
>
>

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