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Janellen Huttenlocher (born February 17, 1932 in Buffalo, New York) is a psychologist and professor known for her research in the field of the child's environment in the development of cognitive skills. She studied at the University of Buffalo and Harvard University. She is the recipient of the APS William James Fellow Award, the APA Award for Distinguished Scientific Contributions to Psychology, and the SRCD Award for Distinguished Scientific Contributions to Child Development.

Biography
Huttenlocher received her B.A. at the University of Buffalo in 1953, and her M.A. in 1958 and Ph.D at Harvard University in 1960. And she finished her postdoctoral training at Harvard University in the 1960s, during the midst of the cognitive revolution. She has been a teacher at the University of Chicago since 1974. Currently, Huttenlocher is a faculty member at the University of Chicago and leads topical seminars with graduate students as well as teaching large undergraduate lecture courses. She also volunteers to teach more than usual. She is the author of two books and over 100 research articles. She has published research articles on a range of topics including language, spatial coding in people, memory and quantitative development.

Research
Huttenlocher was most known for the findings of verbal behavior of parents and teachers. She not only determined children's vocabulary growth, but also their grammatical learning. She also focused on the effects of early input on children's syntactic development.

Representative Publication
Huttenlocher, J., Haight, W., Bryk, A., Seltzer, M., & Lyons, T. (1991). Early vocabulary growth: Relation to language input and gender. Developmental Psychology, 27(2), 236-248.