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Group: Administrators
Posts: 13K,
Visits: 109K
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If you have a slider ranging from 0 to 100, you should be able to reverse-score it mathematically by calculating 100 minus the slider-response.
<values>
/ score = 0
</values>
<block myblock>
/ trials = [1=mypage]
</block>
<surveypage mypage>
/ ontrialend = [values.score = slider.a.response + (100-slider.b.response)]
/ questions = [1=a; 2=b]
</surveypage>
<slider a>
/ caption = "Scoring: Normal"
/ range = (0,100)
</slider>
<slider b>
/ caption = "Scoring: Reversed"
/ range = (0,100)
</slider>
<data>
/ columns = [date time subject trialnum trialcode slider.a.response slider.b.response values.score]
/ separatefiles = true
</data>
Slider 'b' in the above would be the one that's reverse-scored.
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