Munzer TG, et al. - In a counterbalanced, laboratory-based, within-individuals study of 37 parent-toddler dyads in a counterbalanced crossover, video-recorded laboratory design at the University of Michigan from May 31 to November 7, 2017, experts investigated parent-toddler social reciprocity while studying enhanced (eg, with sound effects, animation) and basic tablet-based books in comparison with print books. In comparison with print books, while reading improved and basic tablet-based books, higher frequency of child body posture limiting parental book access, child closing the book, parent pivoting, child pushing parent’s hand, and parent pushing child’s hand happened. Child pivots happened more often while reading basic tablet-based books vs print. Therefore, in this study, when reading tablet-based in comparison with print books, kids and parents engaged in more frequent social control behaviors and less social reciprocity. Moreover, these findings imply that in shared tablet experiences with their parents, kids could have a hard time getting involved.