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Defining region of interest using a mouse response

Hi, and this is probably a very simple problem, but I haven't hacked it yet!

I'm using a mouse response in a very simple experiment where the user needs to click on the largest of three numbers (png images) on a linked sketchpad. This means I need to define the image as a region of interest, presumably using cursor_coi, and set this as a correct response, but I haven't sussed out how to do this.

Any tips hugely appreciated!

Charles

Comments

  • edited July 16

    Hi Charles,

    The variable cursor_roi contains a semicolon-separated list of the names of all the elements that the participant clicked on. (There can be multiple, because elements can overlap.) If you want to check whether the participant clicked on the correct element, and assuming that you have specified the name of the correct element in a variable called correct_response , then you can do this with the following code in the run phase of an inline_script that follows mouse_respone :

    if var.correct_response in var.cursor_roi:
       var.correct = 1
    else:
       var.correct = 0
    

    See also:

    Cheers!

    Sebastiaan

    Buy Me A Coffee

  • Thanks, Sebastiaan, but still not managing to get it right! Seems a bit of a cheeky ask, but might I possibly send it to you to have a quick look at? It's just a tiny excerpt from a longer experiment that works well with keyboard responses, and I've adapted a snippet to see if I can make it work with mouseclick, as that seems so much more user-friendly. Probably shouldn't take a moment - simply clicking on the largest of three numbers that appear on the screen. It seems to stick on the correct_response variable - however I try to enter it, it comes up as invalid.....

    Charles

    😣

  • Hi @Charles ,

    The first thing to do is to assign names to the elements in the sketchpad . You can do this by selecting an element, and then entering something in the name field (which says 'auto' now). This is necessary for OpenSesame to know what the elements are called. Next, you have to assign values to the correct_response variable, which you have left empty now. This is necessary for OpenSesame to know the name of the element that is considered correct. Do you see the logic? Once you've done that, I suspect that things should work as you'd like them to.

    Cheers!

    Sebastiaan

    Buy Me A Coffee

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