1922  | 
                Margaret Evertson 
                    Cobb, “The Mentality of Dependent Children,” 
                    Journal of Delinquency 7 (May 1922):132-140.  | 
              
               
                |   1927  | 
                Barbara Stoddard Burks, “Foster Parent-Foster Child 
                    Comparisons as Evidence Upon The Nature-Nurture Problem,” 
                    Proceedings of the National Academy of Sciences 13, 
                    no. 12 (December 15, 1927):846-848.  | 
              
               
                |   1928  | 
                Barbara Stoddard Burks, “The Relative Influence of 
                    Nature and Nurture Upon Mental Development; A Comparative 
                    Study of Foster Parent-Foster child Resemblance and True Parent-True 
                    Child Resemblance,” 27th Yearbook of the National 
                    Society for the Study of Education, part 1 (1928):219-316.  | 
              
               
                1928  | 
                Frank Nugent Freeman et. al., “The Influence of Environment 
                    on the Intelligence, School Achievement, and Conduct of Foster 
                    Children,” 27th Yearbook of the National Society 
                    for the Study of Education, part 1 (1928):103-217.  | 
              
               
                |   1929  | 
                Frank N. Freeman, “An Investigation of the Intelligence 
                    of Foster Children,” Social Service Review 
                    3 (1929):30-34.  | 
              
               
                1932  | 
                Alice Leahy, “A Study of Certain Selective Factors 
                    Influencing Prediction of the Mental Status of Adoptive Children, 
                    or Adopted Children in Nature-Nurture Research,” Pedagogical 
                    Seminary and Journal of Genetic Psychology 41 (December 
                    1932):294-329.  | 
              
               
                1932  | 
                Dorothy K. Hallowell, “Stability of Mental Test Ratings 
                    for Preschool Children,” Pedagogical Seminary and 
                    Journal of Genetic Psychology 40 (1932):406-420.  | 
              
               
                |   1933  | 
                Alice Leahy, “Some Characteristics of Adoptive Parents,” 
                    American Journal of Sociology 38 (January 1933):548-563.  | 
              
               
                |   1933  | 
                Donah B. Lithauer and Otto Klineberg, “A Study of 
                    the Variation in IQ of a Group of Dependent Children in Institution 
                    and Foster Home,” Journal of Genetic Psychology 
                    42, no. 1 (March 1933):236-242.  | 
              
               
                |   1935  | 
                Alice M. Leahy, “Nature-Nurture and Intelligence,” 
                    Genetic Psychology Monographs 17, no. 4 (August 1935):235-308.  | 
              
               
                |   1935  | 
                Alice M. Leahy, “A Study of Adopted Children as a 
                    Method of Investigating Nature-Nurture,” Journal 
                    of the American Statistical Association 30 (March 1935):281-287.  | 
              
               
                |   1936  | 
                Harold M. Skeels, “The Relation of the Foster Home 
                    Environment to the Mental Development of Children Placed in 
                    Infancy,” Child Development 7, no. 1 (March 
                    1936):1-5.  | 
              
               
                |   1937  | 
                Emmett L. Schott, “IQ Changes in Foster Home Children,” 
                    Journal of Applied Psychology 21 (1937):107-112.  | 
              
               
                1937  | 
                Alice Leahy Shea, “Family Background and the Placement 
                    of Illegitimate Children,” American Journal of Sociology 
                    93, no. 1 (July 1937):103-104.  | 
              
               
                |   1938  | 
                Donald Snygg, “The Relation Between Intelligence 
                    of Mothers and Their Children Living in Foster Homes,” 
                    Journal of Genetic Psychology 52 (1938):401-406.  | 
              
               
                |   1938  | 
                Marie Skodak, “The Mental Development of Adopted 
                    Children Whose True Mothers are Feeble-Minded,” Child 
                    Development 9, no. 3 (September 1938): 303-308.  | 
              
               
                1939  | 
                Harold M. Skeels, “Mental Development of Children 
                    in Foster Homes,” Journal of Consulting Psychology 
                    2, no. 2 (March-April 1939):33-43.  | 
              
               
                |   1939  | 
                Harold M. Skeels and Harold B. Dye, “A Study of the 
                    Effects of Differential Stimulation on Mentally Retarded Children,” 
                    Proceedings and Addresses of the American Association 
                    on Mental Deficiency 44 (1939):114-136.  | 
              
               
                1939  | 
                Marie Skodak, “Children in Foster Homes: A Study 
                    of Mental Development,” Studies in Child Welfare 
                    16, no. 1 (1939):1-156.  | 
              
               
                |   1945  | 
                Anne Roe and Barbara Burks, “Adult Adjustment of 
                    Foster Children of Alcoholic and Psychotic Parentage and the 
                    Influence of the Foster Home,” Memoirs of the Section 
                    on Alcohol Studies, Yale University, No. 3, Quarterly 
                    Journal of Studies on Alcohol (New Haven, 1945).  | 
              
               
                |   1948  | 
                Harold M. Skeels and Irene Harms, “Children With 
                    Inferior Social Histories: Their Mental Development in Adoptive 
                    Homes,” Journal of Genetic Psychology 72 (June 
                    1948):283-294.  | 
              
               
                |   1949  | 
                Marie Skodak and Harold M. Skeels, “A Final Follow-Up 
                    Study of One Hundred Adopted Children,” Journal 
                    of Genetic Psychology 75 (September 1949):85-125.  | 
              
               
                |   1965  | 
                Harold M. Skeels, “Effects of Adoption on Children 
                    from Institutions,” Children (January-February 
                    1965):33-34.  | 
              
               
                |   1966  | 
                Harold M. Skeels, “Adult Status of Children With 
                    Contrasting Early Life Experiences: A Follow-Up Study,” 
                    Monographs of the Society for Research in Child Development 
                    31, no. 3 (1966), 1-65.  | 
              
               
                1968  | 
                Seymour S. Kety et al, “The Types and Prevalence 
                    of Mental Illness in the Biological and Adoptive Families 
                    of Adopted Schizophrenics,” Journal of Psychiatric 
                    Research 6 suppl. 1 (November 1968):345-362.  | 
              
               
                1974  | 
                Leon J. Kamin, “Studies of Adopted Children,” 
                    in The Science and Politics of I.Q. (Potomac, MD: 
                    Lawrence Erlbaum Associates, 1974), 111-134  | 
              
               
                1981  | 
                Leon Kamin, “Studies of Adopted Children,” 
                    in The Intelligence Controversy: H.J. Eysenck Versus Leon 
                    Kamin (New York: John Wiley and Sons, 1981), 114-125.  | 
              
               
                1985  | 
                Robert Plomin and John C. DeFries, Origins of Individual 
                    Differences in Infancy: The Colorado Adoption Project 
                    (Orlando: Academic Press, 1985).  | 
              
               
                1992  | 
                Seymour S. Kety and Loring J. Ingraham, “Genetic 
                    Transmission and Improved Diagnosis of Schizophrenia From 
                    Pedigrees of Adoptees,” Journal of Psychiatric Research 
                    26, no. 4 (1992):247-255.  | 
              
               
                1994  | 
                Seymour Kety et al., “Mental Illness in the Biological 
                    and Adoptive Relatives of Schizophrenic Adoptees,” Archives 
                    of General Psychiatry 51 (June 1994):442-455.  | 
              
               
                1998  | 
                David Howe, Patterns of Adoption: Nature, Nurture and 
                    Psychosocial Development (Oxford: Blackwell, 1998).  |