From the page: "Children whose father's vocabulary was more varied when they were 2 years old had more advanced language skills at age 3. Surprisingly, the dads spoke less and asked fewer questions than the mothers, suggesting it was not how much they spo
J. DeLoache. Child Psychology in Retrospect and Prospect: In Celebration of the 75th Anniversary of the Institute of Child Development, Lawrence Erlbaum Associates, Mahwah, NJ, (2002)