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@iamgodsproperty A p-value that high means that you are likely to get the given correlation (r=0.00) 88% of the time if the null hypothesis is true (I.e., if there no relationship between daycare hours and externalizing symptoms in this case). It means that the study cannot reject the null...

@musore Yep we do a Superman toss and it works well! I tend to do it over a couch just in case, but haven’t had an issue with LO falling or anything.

@saulfactuspaul Yes one of the cool things about this study is that it looks at changes in a given child’s behavior over time related to the number of hours they were in daycare over time. This accounts for those biases well. Also, there are some studies included in this analysis where the...

@testoffaith See my edit! That’s the first time point they measured externalizing behaviors, not when the infants entered daycare. The study includes infants who started younger than that.

@katrina2017 The graph in Figure 1 does show it is closer to 12mo at earliest entry. I’ve edited my post to reflect this. I was reading the full study at 5am on my phone when nursing, so I appreciate the correction. It is still relevant to “kids under 2” though.

@katrina2017 The parental leave in Norway is 10mo, so most infants begin around that time with variation by birth month. I noted that in my summary and agree it is not applicable at very young ages. The quality comparisons between the US and Norway are less clear. A strong parental leave...

@katrina2017 The linked study in edit 2 does not find an effect for kids under 2 specifically. Also, the prior literature on age of entry has a lot of methodological issues. See Dearing 2017 for an overview. This study is relevant because it is of particularly high quality.

@katrina2017 I do have issues with the blog post as it ignores much of the daycare literature, which is of poor quality to begin with — see Dearing 2017 for a review of issues. While this study is not specific to a certain age of entry, it includes children under 2 and does not find an effect...

@continualseeker Thanks for pointing that out. There are SO many studies showing that the parenting quality makes a huge difference in children’s behaviors. Low parental warmth/sensitivity and high parental harshness are strongly linked to externalizing behaviors. Additionally, parent child...

@christianloyalty Totally agree! There is a lot wrong with the previous daycare literature (see Dearing 2017) and more study is definitely needed.

@yahwhshua While they cannot distinguish age at first entry (since all the studies do not include that information), they do have kids who entered daycare as infants within the study. See my edit for the ages that the longitudinal studies began tracking. Some of those infants did in fact begin...

@continualseeker Done! Thanks for adding it! I have access to the full text, but didn’t know how to share it without my credentials.

@katrina2017 Thank you! I’m really glad you found the post helpful.

@simondarok Maybe agenda is the wrong word, but she tried to frame studies to show mothers should stay home with their infants before age 2 years and ignores any study that does not fit that narrative. She has refused in the past to add studies with null results for children under the age of 2...

@jaimegage I am not misunderstanding the study at all. Those comments are overlooking the fact that this study pretty conclusively shows that there are no associations between number of hours in daycare and externalizing symptoms as a whole!! It is not set up to discuss age at entry, but it does...

@jaimegage I don’t know if you’ve interacted with the author of the blog post, but I have and she blocked me for sending her studies that counteract her message instead of editing the post. She has an agenda and ignored half the existing daycare research. I honestly do not believe the blog post...

@leematthew1234 That’s incorrect. The only studies that show an effect were in the Netherlands and in Norway, but they only did so in the random effects model and the overall estimate is not significant. For the fixed effects model, which is a much better statistical control, none of the studies...

@yahwhshua We also have studies demonstrating null evidence by age of entry, so I’m not sure why the positive effects should be given priority. Those studies are not better just because they see an effect. They’re not proven to be the ground truth, so they cannot be assumed to be confounding...

@metbeimife1973 Yeah I was always told I had A+ blood by my mom. Turns out both me and the baby are actually O+

@yahwhshua What do you think is the best evidence available? Because this seems to address issues with statistical analyses from previous studies and uses data from multiple countries.