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Ganie B. DeHart

Distinguished Teaching Professor of Psychology
Bailey 119
Portrait of Ganie DeHart

Ganie DeHart has been a member of the Geneseo faculty since 1988.

Office Hours

Office hours vary by semester. See the whiteboard outside my office for current hours.

Research Interests

  • The students in my lab and I are engaged in a longitudinal study of sibling and friend relationships from early childhood through early adulthood, as well as four student-initiated studies of sibling relationships across cultures (Latinx, Caribbean-American, Chinese-American, and African immigrant).

Links of Interest

Curriculum Vitae


  • Ph.D., Developmental Psychology, University of Minnesota, 1990

  • M.A., Education of Gifted Children, Johns Hopkins University, 1980

  • B.S., Psychology, Brigham Young University, 1972

Recent Courses Taught

  • Child Development

  • Cross-cultural Psychology

  • Gender and the Development of Aggression

    A seminar-style class exploring normative and individual development of aggression, focusing particularly on gender-related differences and similarities; focus on applied issues, including bullying and neighborhood violence. Includes service learning in local after-school programs and nearby secondary schools.

Selected Publications

  • Paine, A. L., Howe, N., Karajan, G., Hay, D. F., & DeHart, G. (in press). “H, I, J, K, L, M, N, O, PEE! Get it? Pee!” Siblings’ shared humor in childhood. British Journal of Developmental Psychology.

  • Leach, J., Howe, N., & DeHart, G. (2019). A longitudinal investigation of siblings' and friends' features of connectedness and interaction quality during play. Early Education and Development, DOI: 10.1080/10409289.2019.1597589.

  • DeHart, G. B. (2018). Secondary sex characteristics. In Bornstein, M. H. (Ed.), The SAGE encyclopedia of lifespan human development. Thousand Oaks, CA: SAGE Publications.

  • Abuhatoum, S., Howe, N., Della Porta, S., & DeHart, G. (2018). A dyadic analysis of power in sibling and friend conflict in early childhood. Infant and Child Development, 27(4) [np].

  • Leach, J., Howe, N., & DeHart, G. (2016). “I wish my people can be like the ducks”: Children’s references to internal states with siblings and friends from early to middle childhood. Infant and Child Development, doi 10.1002/icd.2015.

  • Leach, J., Howe, N., & DeHart, G. (2015). “An earthquake shocked up the land!”: Pretend play with siblings and friends. Social Development, 24, 95-112.

  • Herrmann, P. A., French, J. A., DeHart, G. B., & Rosengren, K. S. (2013). Essentialist reasoning and knowledge effects on biological reasoning in young children. Merrill-Palmer Quarterly: Special Issue on Developing Concepts of Evolution, 59(2), 198-220.

  • Susman, E. J., Houts, R. M., Steinberg, L. D., Belsky, J., Cauffman, E., DeHart, G. B., Friedman, S. L., Roisman, G. I., Halpern-Fischer, B. L., for the Eunice Kennedy Shriver NICHD Early Child Care Research Network. (2010). Longitudinal development of secondary sexual characteristics in girls and boys between ages 9 ½ and 15 ½ years. Archives of Pediatrics and Adolescent Medicine, 164(2), 166-173.

  • DeHart, G. B. (2008). Research as teaching in developmental science: Part II. Developments: SRCD Newsletter, 51(3), 4.

  • Belsky, J., Steinberg, L. D., Houts, R. M., Friedman, S. L., DeHart, G. B., Cauffman, B., Roisman, G., Halpern-Felsher, B., Susman, E., & The NICHD Early Child Care and Youth Development Research Network. (2007). Family rearing antecedents of pubertal timing. Child Development, 78, 1302-1321.

  • Stauffacher, K., & DeHart, G. B. (2006) Crossing social contexts: Relational aggression during early and middle childhood. Journal of Applied Developmental Psychology, 27, 228-240.

  • NICHD Early Childhood Research Network (2005). Non maternal care and family factors in early development: An overview of the NICHD Study of Early Child Care. In NICHD Early Childhood Research Network (Ed.), Child care and child development: Results from the NICHD Study of Early Child Care and Youth Development, pp. 3-36. (Reprinted from Journal of Applied Developmental Psychology, 22, 457-492.) (Lead author.)


  • PSYC 321: Dev Psych: Applied Dev Psych

    An advanced course examining particular developmental domains or issues, with an emphasis on evaluation of contemporary research. Typical offerings include topics in cognitive development, social development, and applied developmental psychology.

  • PSYC 385: M/Cross-Cultural Psychology

    A consideration of the influence of culture on human behavior and development, both normal and abnormal. Emphasis is placed on research dealing with non-Western cultures and minority cultures in the United States.