Is the 3 item PEG (Pain Enjoyment General Activity) in the public domain--free to use (e.g. does not require license).
Judging from the fact that the scale is online complete with scoring instructions at a university website, I think you can safely assume so. I was looking at
http://www.med.umich.edu/1info/FHP/practiceguides/pain/PEG.Scale.12.2016.pdf
Generally if they're not true open access, you'll be led to a paying site or one that requires verification of credentials..
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