Virginia E Vitiello

Variation in children's classroom engagement throughout a day in preschool: Relations to classroom and child factors.

Amanda P. Williford, J. Downer, Jason T Downer, 2012, Early childhood research quarterly.

Observations of Children's Interactions with Teachers, Peers, and Tasks across Preschool Classroom Activity Settings

J. Downer, Jason T Downer, Leslie M. Booren, 2012, Early education and development.