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Touchscreens and matlab

Dear Ben,

We recently used a touchscreen (Keytec, Magic Touch Screen, KTMT-1500-USB) linked to Matlab to obtain responses from children. I think it cosr £150 at the time. That isn't too bad really. It was very simply to set up and was up and running immediately.The touchscreen is simply a mouse.

It's actually pretty simple in terms of the code for Matlab. We used it to obtain 2AFC responses from children. You need to split the screen into two (left and right). You then set up the code such that the location of the response (based on the size of you monitor) records some number 1 or 2. Matlab just needs to be told how to convert the spatial location of the response on the monitor into a number 0 or 1/ 1 or 2. It will depend on what you want to do, but it is really easy. If you want more info let me know.


Sandra Quinn

> Date: Wed, 21 Sep 2011 09:25:54 -0500
> From: "Hornsby, Benjamin Wade Young" <ben.hornsby@xxxxxxxxxxxxxx>
> Subject: Suggestions for touch screen tablets for auditory experiments
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> Hi All,
> I am working on a program to present nonsense syllables (CV and VC) at vari=
> ous SNRs and in various filter conditions. In past work I've used Matlab to=
> develop the base program, TDT software for stimulus presentation and Matla=
> b for GUIs that allow subjects to respond via mouse click on a computer mon=
> itor.
> However, I'd like to branch out and use a touch screen monitor to collect s=
> ubject responses. My target population is elderly hearing impaired listener=
> s and my thought is the touch screen response system may be easier than usi=
> ng a mouse. The screen would need to be large enough to clearly display all=
> the consonant (23) and vowel (3) options for my stimuli.
> I've not done this type of programming and am hopeful that some of you with=
> experience might direct me to specific touch screen monitors that would be=
> appropriate and computer programming languages (if Matlab won't do it) to =
> use to develop this type of program. I'm also working on a budget for this =
> so any information regarding approximate costs for specific touch screen mo=
> nitors that would be appropriate for this type of experiment would also be =
> appreciated.
> Just starting out so all comments are appreciated.
> Thanks much,
> Ben
> Benjamin W.Y. Hornsby, Ph.D.
> Assistant Professor
> Vanderbilt Bill Wilkerson Center
> Department of Hearing and Speech Sciences
> Mailing Address
> Room 8310 Medical Center East, South Tower
> 1215 21st Ave. South, Nashville, TN 37232-8242