“Are Relational Inferences from Crowdsourced and Opt-in Samples Generalizable? Comparing Criminal Justice Attitudes in the GSS and Five Online Samples”

Justin Pickett writes: You’ve blogged a good bit on MTurk, weighting, and model-based inference. Drawing heavily on your work (Gelman, 2007; Gelman and Carlin, 2002; Wang et al., 2015), Andrew Thompson and I [Pickett] just published a study that largely confirms your concerns about MTurk (and opt-in samples), but that also emphasizes the promise of …