randomizing font color and/or stimuli from groups

V
Guest

randomizing font color and/or stimuli from groups Jul 25, 2020 0:48:07 GMT

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Post by V on Jul 25, 2020 0:48:07 GMT

Hello,

Is it possible to get psytoolkit to run something like a stroop task but the color of each word is pseudo-randomly determined at the beginning of the trial?
For example, I want to show the words "apple", "orange", "banana" and i want them to show up as either red, green or blue.

If that's not possible, can I make 2 or 3 sets of stimuli, let's say A and B, and at each trial randomly draw from one of the two/three, without replacement?

Thank you!

PsyToolkit
Administrator

Posts: 547

randomizing font color and/or stimuli from groups Jul 25, 2020 13:50:17 GMT

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Post by PsyToolkit on Jul 25, 2020 13:50:17 GMT

If you want to do the Stroop task, it is best to look at the example code here.

Often, there are multiple ways to do exactly the same thing.

The "table" is idea for randomly choosing different conditions.

You can also do it by using the "set random" instruction, choose a random number, and use that to set a color.

Play around a bit with it and you will see it will work either way.

V Guest	randomizing font color and/or stimuli from groups Jul 25, 2020 19:51:03 GMT Quote Select Post Deselect Post Link to Post Back to Top Post by V on Jul 25, 2020 19:51:03 GMT Thank you. If I understood the code correctly, it uses bitmaps/images for the stimuli. Is there a reason that's preferred to just displaying text?

PsyToolkit
Administrator

Posts: 547

randomizing font color and/or stimuli from groups Jul 28, 2020 21:46:23 GMT

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Post by PsyToolkit on Jul 28, 2020 21:46:23 GMT

Of course you can use both. It works well for "basic" fonts that are supported by all browsers. The problem is that if you want special fonts, they might not be rendered exactly the same way. Personally, I like to make text with bitmaps, but you can also do it with text directly.

PsyToolkit is continually being improved, and if you have special wishes, please take part in the user survey that you see when you login to your account (the link is at the top).

randomizing font color and/or stimuli from groups

Post by V on Jul 25, 2020 0:48:07 GMT

Post by PsyToolkit on Jul 25, 2020 13:50:17 GMT

Post by V on Jul 25, 2020 19:51:03 GMT

Post by PsyToolkit on Jul 28, 2020 21:46:23 GMT