Barbara Tizard, Judith Rees, A Comparison of the Effects of Adoption, Restoration to the Natural Mother, and Continued Institutionalization on the Cognitive Development of Four-Year-Old Children, Child Development, Vol. 45, No. 1 (Mar., 1974), pp. 92-99
No takes yet. Share an insight, caveat, or question.
Tizard et al. (1974) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: