John, thank you for the prompt response. Are the raw data available to view?
One thing I am curious about is the attrition rate. I witnessed a number of people leaving early for one reason or another. The participants in the research paper you linked had an attrition rate of only 4%. I suspect that is artificially low due to the self-selected nature of the survey and maybe there's no easy way around that. But it has to be higher, I think, even without including those who didn't even start.
