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Thread: Something similar to a visual analog scale (case 27555)

  1. #1
    Join Date
    Jul 2017
    Posts
    2

    Something similar to a visual analog scale (case 27555)

    Hi,

    I want to make something like a visual analog scale. Participants should rate stimuli by clicking on a glass which then is filled up to the point where they clicked (no "filling animation", just the glass filled to that point) and then click a button if want to continue. From what I found, it is not possible to make a vas in DirectRT (but in MediaLab which I do not have access to). I tried using different images that appear when participants click on predefinded areas (and setting the button as the correct answer to continue to the next trial), but I don't know how to make this in one trial. I used jumping to jump to specific trials, but then I have a little flash between the different glasses because the screen is prepared. My question would be, is it possible to do this in one trial, i.e. get rid of the flashing?

    A second problem I have is that it should be possible to get back to a less filled glass, e.g. starting with an empty glass, clicking on top to have full glass, clicking in the middle to have it half filled. I could do this by jumping between trials, but how do I know how much the glass was filled when they hit the button? I would need to have these "jump trials" for every trial which would make a huge amount of trials.
    Last edited by jason_reed; 07-25-2017 at 01:42 PM.

  2. #2
    Join Date
    Feb 2013
    Posts
    986
    Hi,

    I'd love to see what files you already created and try to run them on my copy of DirectRT. Please either upload them here or send them to me directly at support@empirisoft.com (please reference case 27555).
    Jason Reed
    Empirisoft Software Support Specialist

  3. #3
    Join Date
    Feb 2013
    Posts
    986
    The "flash" is a normal part of DirectRT functioning as DirectRT ends one trial row of the input file and prepares to present the subsequent trial row. You can try setting the background color of the first row of your styles.drt to the same background as your trials to see what this does about the "flash."

    Take a look at the attached file and let me know if that is what you had in mind when you wanted to "get rid of the flash"

    The jump and skip features can only move to rows of the input file that come after the request for jumping or skipping; it cannot move backwards into the input file to trials that have already been presented.
    Attached Files Attached Files
    Jason Reed
    Empirisoft Software Support Specialist

  4. #4
    Join Date
    Jul 2017
    Posts
    2
    Thanks for the answer. That's a possible solution to get rid of the flash (only being able to make the glass fuller is ok). But for some reason I always have to click until the glass is completely filled. If click the green button to continue, it still shows the remaining glasses instead of skipping to the next trial. Or am I missing something?

    Some other point: Would it be possible to make something like a dummy trial where the response (i.e the area that was clicked on before the green button) is stored? In this solution I need to look in the log file to see the last response before the green button response.

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