78% of American college students have self-censored their opinions in a class discussion.https://twitter.com/simongerman600/status/1064247016790863872 …
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I'm not sure--but asking college students if they've done so is not it.
Any study would pretty much be a defined version of the same thing, asking a whole lot more questions to obtain conceptual accuracy, just to get what would most likely be a near identical result. I get your point I just think it's moot in this particular case.
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