MTurk workers are incentivized to answer quickly, not truthfully.
Internet polls are bullshit.
It's just as easy to argue - when you're not citing any evidence - that online respondents are more likely to be truthful because they're anonymous, and therefore their answer doesn't have an impact on their social reputation.
It’s not a fucking Facebook poll, it’s a peer-reviewed multi-population study.
Which doesn't prevent truthfulness if it doesn't take more time.
Besides, they didn't say that they're super popular and cool -- so why'd they lie about not having a rich social life?
>Internet polls are bullshit.
Not really.