[visionlist] Are there any working interactive demos of SDT decision space and ROC space on the web?

Thu Sep 6 17:34:53 -05 2018

Thanks so much, Tim!

Best wishes,

Les

On Tue, Sep 4, 2018 at 10:24 AM Timothy Vickery <tim.vickery at gmail.com>
wrote:

> Hi Lester,
>
> I hacked a little SDT/ROC thing together in Javascript a while back. Needs
> some polish but might help with at least part of what you're looking for,
> requires zero effort to host, and should run in any modern browser. If you
> have recommendations for improving it / making it more useful, I'd be
> delighted to hear them.
> http://cogneurolab.org/tools/SDT_withROC.html
>
> -Tim
>
> On Mon, Sep 3, 2018 at 9:01 AM Kenneth Knoblauch <ken.knoblauch at inserm.fr>
> wrote:
>
>> Hi,
>>
>> Several years ago, I wrote a simple web app in R (
>> https://www.r-project.org) using the shiny package (
>> https://cran.r-project.org/web/packages/shiny/index.html) for an STD
>> demonstrator.  I have used it in courses and tutorials that I have given
>> and have shared the code when asked.  To run it, you have to put the two
>> attached files in a directory.  Then run R from that directory (or set that
>> directory to your working directory from within R)  and load the shiny
>> package (after having previously installed it and any of its dependencies)
>> with the command: library(shiny).  Then from the command line type:
>> runApp().  It should open a browser window with sliders and plots that are
>> self-evident.  I haven't looked at the code in a long while, but it worked
>> when I just tried it using Safari on a Mac running High Sierra.
>>
>> best,
>>
>> Ken
>> --
>> Kenneth Knoblauch
>> Inserm U1208
>> Stem-cell and Brain Research Institute
>> 18 avenue du Doyen Lépine
>> 69500 Bron
>> France
>> tel: +33 (0)4 72 91 34 77
>> fax: +33 (0)4 72 91 34 61
>> portable: +33 (0)6 84 10 64 10
>> http://www.sbri.fr/user/1453
>>
>>
>> On 02-09-2018 22:18, Lester Loschky wrote:
>>
>> Hi Everybody,
>>
>> For a long time, I've used interactive web-based demonstrations of Signal
>> Detection Theory (SDT) decision space and ROC space to teach students about
>> the underlying statistical theory of SDT.  So, I would like to start this
>> posting by giving a big "Thank You!!" to the folks at Claremont Graduate
>> University, Ann Bisantz, John Krantz, and Garrett Neske who have made it
>> possible to do so!  That has been a great educational gift from each of
>> them to the world wide community.
>>
>> Having said that, 3 of the 4 ones I ones I know of were written in Java,
>> and are now no longer able to be run due to being blocked by Java security
>> (with no possibility of unblocking them).
>>
>> For example, at Claremont Graduate University, the Web Interface for
>> Statistics Education (WISE) website had a really nice demo of the SDT
>> decision space and how it maps onto the ROC space:
>>
>> http://wise.cgu.edu/portfolio/demo-signal-detection-theory/
>>
>> However, that Java applet no longer runs due to being blocked by Java
>> security.  So, you get an error message if you try to run it, which says:
>> "Application Blocked. Click for details"
>>
>> I used to be able to add that Java Applet to my trusted Java exceptions
>> in the Security tab of Preferences in my web browser (Safari).  However,
>> while I can currently add the WISE website to the exceptions list, I can no
>> longer add that particular page to the list.  The folks at WISE are aware
>> of this, and have the following notice about it on their Troubleshooting
>> page:
>>
>>
>>> Enable JavaScript
>>> You no longer can unblock Java for specific pages. The applets written
>>> in JavaScript will work, but the older Java applets will not.
>>
>>
>> Evidently, that demo is an older Java applet that was not written in
>> JavaScript.
>>
>> Similarly, I have had the same problem for John Krantz's SDT demos at
>> Hanover College:
>> https://psych.hanover.edu/JavaTest/SDT/outcomes.html
>> https://psych.hanover.edu/JavaTest/SDT/ROC.html
>>
>> Likewise, there used to be a really nice web-based interactive demo of
>> the SDT decision space and ROC space by Ann Bisantz at SUNY Buffalo.
>> However, I can no longer find it on the web (and if it was written as an
>> older Java applet, probably would not run now).
>>
>> Garrett Neske has very kindly shared a nice interactive demo of the SDT
>> decision space and ROC curve on the Wolfram (Mathematica) Demonstrations
>> Project, which you can download and run using the Wolfram CDF player.
>> However, unlike the Claremont WISE and Bisantz interactive demos, it does
>> not report d' and c.  Having said that, it does give H and F rates out of
>> 1,000 signal present and absent trials each, so one can calculate d' and c
>> with students in class, but it isn't automatic as with the other
>> interactive demos.  I guess from an educational standpoint it's a trade-off
>> between a) fluidity of demonstrating the concepts and b) demonstrating how
>> to calculate d' and c.  Currently, this is the interactive demo I use in
>> class (hats off to Garrett).
>>
>> However, out of curiosity, I'm wondering, are there any other web-based
>> demos of the SDT decision space and ROC space that currently work?
>>
>> Best wishes,
>>
>> Les Loschky
>>
>> --
>> Lester Loschky
>> Professor
>> Associate Director, Cognitive and Neurobiological Approaches to
>> Plasticity Center
>> Department of Psychological Sciences
>> 471 Bluemont Hall
>> 1114 Mid-Campus Dr North
>> Kansas State University
>> Manhattan, KS  66506-5302
>> email: loschky at ksu.edu
>> research page: https://www.k-state.edu/psych/research/loschkylester.html
>> lab page: http://www.k-state.edu/psych/vcl/index.html
>>
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>

-- 
Lester Loschky
Professor
Associate Director, Cognitive and Neurobiological Approaches to Plasticity
Center
Department of Psychological Sciences
471 Bluemont Hall
1114 Mid-Campus Dr North
Kansas State University
Manhattan, KS  66506-5302
email: loschky at ksu.edu
research page: https://www.k-state.edu/psych/research/loschkylester.html
lab page: http://www.k-state.edu/psych/vcl/index.html
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