Designing the multi-stimuli Experiment

[Dilip Kumar]

Hello,

I want to design a multi-stimuli experiment which will include Motor Response Task, Numerical Judgment Task, and combined Computation and Numerical Judgement Task. Each task will have 10 trials presented with random stimuli (total of 30 trials in random order).

- Motor Task will include pressing Left/Right button whichever is displaced in stimuli screen.

- Numerical Judgment task will include memorizing two numbers displayed in stimuli and responding with which one was larger/smaller on left/right side by pressing corresponding button.

- Computation & Numerical Judgment Task will add performing subtraction in numerical judgment task and pressing the corresponding left/right button to identify larger/smaller number

My proposed paper based design is as follows:

SessionProc

- Introduction

- Experiment Design

-- Stimuli Design

--- MotorTask       

---- TrialProc-> Stimulus + Fixation + Feedback

--- NumericTast

---- TrialProc-> Stimulus + Fixation + Feedback

--- ComputationalNumericTast

---- TrialProc-> Stimulus + Fixation + Feedback

- Thankyou/Goodbye

I have recently started using E-prime trial version and I am not sure on how to go about designing this experiment. How do I include multiple stimuli Numeric and/or Word format, How can i add subtraction in Numerical Size Judgment task to make it Computational Numeric Judgment Task.

Any guideline or suggestions on designing this experiment will be highly appreciated.

Thank You.

Best Regards,

Dilip

[David Vinson]

My approach would be to break down the experiment one task at a time:

Pick one of your three tasks and figure out how to display one stimulus
and collect a response to it.
Once that is working to your satisfaction then scale up to present
multiple stimuli drawn from a List object.
And then once that works, add in the additional elements of the TrialProc.

Since your tasks get incrementally more complicated, start with the
motor task - this seems very straightforward to setup in E-Prime and
will help you understand how List objects work.
You can display multiple stimuli (whether string or numeric) on a
TextDisplay object by using attribute references like [Stimulus1] and
[Stimulus2].

This is the basics of E-Prime so if you are having trouble with it, I
strongly urge you to go through the getting started guide and at least
some of the documentation.

best,
-dv

On 27/03/2014 07:01, Dilip Kumar wrote:
> Hello,
>
> I want to design a multi-stimuli experiment which will include Motor
> Response Task, Numerical Judgment Task, and combined Computation and
> Numerical Judgement Task. Each task will have 10 trials presented with
> random stimuli (total of 30 trials in random order).
>
> - Motor Task will include pressing Left/Right button whichever is
> displaced in stimuli screen.
> - Numerical Judgment task will include memorizing two numbers
> displayed in stimuli and responding with which one was larger/smaller
> on left/right side by pressing corresponding button.
> - Computation & Numerical Judgment Task will add performing
> subtraction in numerical judgment task and pressing the corresponding
> left/right button to identify larger/smaller number
>
> My proposed paper based design is as follows:

> *SessionProc*

> - Introduction
> - Experiment Design
> -- Stimuli Design
> --- MotorTask
> ---- TrialProc-> Stimulus + Fixation + Feedback
> --- NumericTast
> ---- TrialProc-> Stimulus + Fixation + Feedback
> --- ComputationalNumericTast
> ---- TrialProc-> Stimulus + Fixation + Feedback
> -Thankyou/Goodbye
>
> I have recently started using E-prime trial version and I am not sure
> on how to go about designing this experiment. How do I include
> multiple stimuli Numeric and/or Word format, How can i add subtraction
> in Numerical Size Judgment task to make it Computational Numeric
> Judgment Task.
> Any guideline or suggestions on designing this experiment will be
> highly appreciated.
>
> Thank You.
>
> Best Regards,
> Dilip

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--
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)

[David McFarlane]

Dilip,

I second David Vinson's advice, and further urge you to first work
through *all* the tutorials in *all* the manuals that come with
E-Prime before you start any real work. Especially work through
Appendix C of the User's Guide, too many users overlook that and this
section contains critical information for your project. Also work
through the New Features Guide, this is really just additional
chapters to the User's Guide.

For US$30 you may also get "The E-Primer"
(www.amazon.com/E-Primer-Introduction-Psychological-Experiments-University/dp/9087281838
), which will take you rather further. And with a bit more money and
time, you may take some training online, see link below. Taking some
time out to do some training in E-Prime will make a real difference
in your work.

-----
David McFarlane
E-Prime training
online: http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter: @EPrimeMaster (https://twitter.com/EPrimeMaster )

[David McFarlane]

Dilip,

I cannot say this enough -- First work through all of the tutorials
in all of the manuals that come with E-Prime (go completely from
cover to cover, page to page -- yes, I am serious!). You will find
many of your questions already answered there.

Regards,

-----
David McFarlane
E-Prime training
online: http://psychology.msu.edu/Workshops_Courses/eprime.aspx
Twitter: @EPrimeMaster (https://twitter.com/EPrimeMaster )

/----
Stock reminder: 1) I do not work for PST. 2) PST's trained staff
take any and all questions at https://support.pstnet.com , and they
strive to respond to all requests in 24-48 hours, so make full use of
it. 3) In addition, PST offers several instructional videos on their
YouTube channel (http://www.youtube.com/user/PSTNET ). 4) If you do
get an answer from PST staff, please extend the courtesy of posting
their reply back here for the sake of others.
\----


At 3/31/2014 03:10 AM Monday, Dilip Kumar wrote:
>Thank You for the suggestions David Vinson and David McFarlane. I
>have worked through some of your suggestions and managed make i two
>stimuli experiment. I have used the TextDisplay to present the
>stimuli which worked perfectly. I was also trying to use
>ImageDisplay to present Stimuli and enhance the experiment design
>but I could not do so due to some run-time error (image load error).
>The sequence of events in BlockProc structure is as follows:
>
>-- ImageDislpay (as stimuli) --> TextDisplay (Fixation) -->
>ImageDisplay (to get response) --> Feedback
>
>My experimental needs involve using ImageDisplay as stimulus in
>order to get multiple kinds of response (Motor / Numerical /
>Computational & Numerical and others) which target different brain segments.
>
>On another note, I want to send random stimuli (both Motor and
>Numerical stimulus in random order). In my design, all the motor
>stimuli are presented together and same happens with numerical
>stimuli. I want to present a mixture of all these stimuli but i'm
>stuck in between. I tried using ranm selection from Blocklist
>properties but could not do so.
>
>Any suggestions for using ImageDisplay as Stimuli are highly
>recommended and will be appreciable.
>
>Thanks and Regards,
>Dilip

[Dilip Kumar]

Dear David,

I am using the trial version of E-prime which contains Getting Started Guide and User Manual only, it does not include any tutorials. We are in the process of purchasing licensed version which will require some time. Meanwhile, I am trying to learn the experiment designing process and I am stuck in using images as stimuli.

Any directions on creating image stimulus list and using it would be quite helpful.

[David McFarlane]

Dilip,

The Getting Started Guide and the User's Guide contain several
valuable tutorials that will answer many of your questions. Please look again.

And just a reminder -- You may indeed use E-Prime in Evaluation mode
for learning and exploring E-Prime. But if you program a real
experiment in Evaluation mode, then, when you get a full license, you
will have to manually rebuild your program from scratch.

Regards,
-- David McFarlane

At 4/1/2014 04:11 AM Tuesday, Dilip Kumar wrote:
>Dear David,
>
>I am using the trial version of E-prime which contains Getting
>Started Guide and User Manual only, it does not include any
>tutorials. We are in the process of purchasing licensed version
>which will require some time. Meanwhile, I am trying to learn the
>experiment designing process and I am stuck in using images as stimuli.
>
>Any directions on creating image stimulus list and using it would be
>quite helpful.
>
>Thanks and Regards,
>Dilip
>
>
>
>
>
>On Tuesday, 1 April 2014 03:02:14 UTC+8, McFarlane, David wrote:
>Dilip,
>
>I cannot say this enough -- First work through all of the tutorials
>in all of the manuals that come with E-Prime (go completely from
>cover to cover, page to page -- yes, I am serious!). You will find
>many of your questions already answered there.
>
>Regards,
>-----
>David McFarlane
>E-Prime training
>online:

><http://psychology.msu.edu/Workshops_Courses/eprime.aspx>http://psychology.msu.edu/Workshops_Courses/eprime.aspx
>
>Twitter: @EPrimeMaster
>(<https://twitter.com/EPrimeMaster>https://twitter.com/EPrimeMaster )

>
>/----
>Stock reminder: 1) I do not work for PST. 2) PST's trained staff
>take any and all questions at

><https://support.pstnet.com>https://support.pstnet.com , and they

>strive to respond to all requests in 24-48 hours, so make full use of
>it. 3) In addition, PST offers several instructional videos on their
>YouTube channel

>(<http://www.youtube.com/user/PSTNET>http://www.youtube.com/user/PSTNET