Young preschoolers rapidly acquire new information from social partners but do not learn efficiently from people on video. We trained parents to use Whitehurst's "dialogic reading" questioning techniques while watching educational television with their children. Eighty-one parents coviewed storybook videos with their 3-year-old children…

An adapted alternating treatments design was used to compare the expressive use of thematic vocabulary by three preschool children with developmental delays during Dialogic Reading, a shared book reading intervention, and Activity-Based Intervention, a naturalistic play-based teaching method. The design was replicated across two early childhood…