Worth mentioning that their summary measure of well-being is more comprehensive than what's typically asked of adults and probably does correlate with learning

Worth mentioning that their summary measure of well-being is more comprehensive than what's typically asked of adults and probably does correlate with learning and development: "Data from 19,957 telephone interviews with parents of 2‐ to 5‐year‐olds assessed their children's digital screen use and psychological well‐being in terms of caregiver attachment, resilience, curiosity, and positive affect in the past month." https://onlinelibrary.wiley.com/doi/full/10.1111/cdev.13007 https://onlinelibrary.wiley.com/doi/full/10.1111/cdev.13007 Still plenty to quibble with in the study though.