Spending an hour or more in front of digital devices each day has a more limited effect on 2-year-olds' growth and development than previously thought, a recent study by Japanese researchers has shown, providing fresh insight into the possible risks of the use of digital devices on toddlers. The study showed that those monitored who used digital devices with screens for over 1 hour per day at age 2 saw no effect in their ability to socialize at age 4, including greeting and apologizing, but some other communication skills and "daily living skills" were slightly poorer than children who used them for less time each day. Such negative effects, however, are very limited and can be reduced if children's screen time is conducted together with parents, the study said