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@damacri First, true experiments are the best available evidence. If not, analyses that control for or stratify by age, given what we know about how daycare has different effects at different ages. As I said above, lumping infants in with toddlers and 3 year olds data will of course produce less...

@damacri Also, to be clear OP, I’m really glad you shared this study! The discussion it’s stirred up is really valuable and there’s lots of good stuff in here and this study IMHO IS a good addition to the literature even if it’s not as groundbreaking as you might have originally thought. I know...

@ellimae Agree! Meta-analyses and reviews are wildly important. Simply pointing out that OP has repeatedly referred to this as a longitudinal multinational study and the papers it analyzes as “sub-studies”, which isn’t accurate. This analysis does not stratify by age and by lumping babies data...

@damacri OP, this is not the best evidence available. You’re fundamentally misunderstanding what this paper even is. It’s not a multinational longitudinal study in and of itself — it’s a re-analysis of EXISTING studies using different statistical techniques than the original authors.

@anon5678 In what way?

@anon5678 Yes, just to add some detail — predicts is the appropriate terminology here and in line with APA standards for reporting regression models (a type of statistical analyses). It means they have built a model from the data that controls for certain variables statistically and the model...