By a4 - 10/19/2016
hello everybody,
as a part of my experiment I want to include a short survey in which participants rate the valence of pictures.
I have 2 questions concerning this:
1. Each page should consist of a pic & a related question. To achieve this I used survey / surveypage with image & radiobutton /slider as questions. However I would prefer both Image & RB/Slider to appear centered (horizontally) and have no idea how to do this.
When I use position =50% its still left aligned (relative to pos) and the halign is not available (/doesnt work if used in <defaults>).
Any ideas how to do this without changing position manually until it fits?
2. I would prefer (horizontal) radio buttons over slider but I would like them to look like a sem. differential. With anchors left & right and numbers above the buttons. For the anchors I am ok with using <caption> and define position manually (at least if the centering of the buttons would work) but is there any option to place the numbers above the buttons automatically?
thanks in advance
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By Dave - 10/19/2016
Re. #1: Positions on surveypages are always relative to the page's left margin AND the question element's left border. Suppose you have an <image> element with a specified width of 50% (cf. /imagesize). To center it on the page, you would have to specify it's horizontal position at 25%.
<image myimage>
/ items = ("example.jpg")
/ imagesize = (50%, 40%)
/ position = (25%, 20%)
</image>
The same is true for other question-type elements, such as <slider>. Define the /slidersize and then apply a little math to position it such that it appears centered.
<image myimage>
/ items = ("example.jpg")
/ imagesize = (50%, 50%)
/ position = (25%, 25%)
</image>
<slider myslider>
/ slidersize = (80%, 10%)
/ position = (10%, 75%)
</slider>
<surveypage mypage>
/ questions = [1=myimage; 2=myslider]
</surveypage>
<defaults>
/ canvasaspectratio = (1,1)
</defaults>
Re. #2: No, there is no option to put automatically put numbers above <radiobuttons> options. You would have to use <caption> elements for that as well.
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By c0sm0s - 11/12/2019
This works only when aspect ratio 1:1. What to do when canvasascpectratio = 4:3 ?
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By Dave - 11/12/2019
+xThis works only when aspect ratio 1:1. What to do when canvasascpectratio = 4:3 ?
Same thing. You need to specify the element's width and height and take them into account.
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