The ManyBabies 1 paper, “Quantifying Sources of Variability in Infancy Research Using the Infant-Directed-Speech Preference” is now out in Advances in Methods and Practices in Psychological Science (AMPPS)!
The journal version is available at: https://doi.org/10.1177/2515245919900809
Open access preprint is available at: https://psyarxiv.com/s98ab/
See also the news releases by Stanford and University of Manitoba.