help desperately needed

[Lisa Levinson]

Thank you for the link to E-Primer, very helpful. Lisa Levinson

On Tue, Aug 9, 2011 at 6:41 AM, Michiel Spape <
Michiel.Spape at nottingham.ac.uk> wrote:

> Hi,****
>
> If you have working code for this design, then what is the problem? Do you
> get stuck somewhere or do you basically want somebody else to code your
> experiment? If the latter, than you might need to hire a programmer – I’m
> sure there are more than enough people here willing to act as one. If your
> budget doesn’t really stretch that far, I’d suggest reading the tutorial and
> the absolutely marvellous E-Primer
> http://step.psy.cmu.edu/materials/EPrimer.pdf . On the other hand, if
> you’re way past that, you could try rephrasing your plea for help in a way
> which makes it more possible for people here to shine: is the blue color the
> problem? Do you not know how to have 200 trials? Is the
> proportion/probability of trial type a problem? Each of these seems
> unlikely, but it is impossible to get a clue from your email.****
>
> Best,****
>
> Mich****
>
> ** **
>
> *Michiel Spapé*
>
> *Research Fellow*
>
> *Perception & Action group*
>
> *University of Nottingham*
>
> *School of Psychology*
>
> *www.cognitology.eu***
>
> ** **
>
> *From:* e-prime at googlegroups.com [mailto:e-prime at googlegroups.com] *On
> Behalf Of *Grisha R
> *Sent:* 09 August 2011 09:17
> *To:* e-prime at googlegroups.com
> *Subject:* help desperately needed****
>
> ** **
>
> Hello, ****
>
> I’ve been struggling in vain to design an experiment in e-prime since last
> several days. The problem is that I have absolutely no background in
> programming or computer science. I’m pleading you for help. ****
>
> Here is the design:****
>
> ** **
>
> To get blue color participant presses left-arrow key and to get red color
> he presses right-arrow key; he can press either key as per his wish. There
> are total two hundred trials. Of the total left-arrow key presses for blue,
> only 50% of the times he gets blue color, whereas remaining 50% of the time
> he gets the other color, that is, red. In the 50% blue that he is getting,
> half are blue squares and the remaining half are blue circles; and in the
> other 50% yellow, half are yellow squares and the remaining half are yellow
> circles. Same for right-arrow key presses for yellow: that is, of the total
> right-arrow key presses only 50% get him yellow color and the remaining 50%
> get him the other color, that is, blue. Of the total yellow, half should be
> yellow squares and the half should be yellow circles; and of the total blue,
> half should be blue squares and the other half should be blue circles. The
> participant reports the shape (whether he saw square or circle, and not the
> color) by pressing an appropriate key (say, upward-arrow key for square and
> the downward-arrow key for circle). ****
>
> ** **
>
> The appearances of stimuli should be randomized for each key-press. The
> percentages should be maintained close to [75% and 25%] and [50% and 50% for
> squares and circles] (as mentioned above) following each key-press. ****
>
> The time duration for making a response is to be recorded for each trial.
> Also, the time the participant takes to make the next left- or right-arrow
> key press (after reporting what he saw in the preceding trial) is also to be
> recorded. ****
>
> I have working code in e-prime for this design. ****
>
>  ****
>
> ** **
>
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