This may be an interesting study for people working on education, learning, and child development: A team at Princeton collected video and survey data from over 20 families in New Jersey, filming interactions in their homes over a two-week period. As we understand, the data will eventually be accessible for other researchers. If you are interested in following this study, you can get in touch with the research group and subscribe to their newsletter. You can find more information on the study here. There’s also a published article in American Behavioral Scientist describing the study.