User:Nancydarling/sandbox

Urie Bronfenbrenner (April 29, 1917 – September 25, 2005) was a Russian-born American psychologist best known for developing a contextual framework for studying human development. This framework was formalized in an article published in American Psychologist, articulated in a series of propositions and hypotheses in his most cited book The Ecology of Human Development and further articulated in The Bioecological Model of Human Development and later writings. He argued that natural experiments, including applied research and policy provided valuable scientific opportunities and was instrumental in the design of the US Head Start program in 1965. Bronfenbrenner's writings about the limitations of understanding child development solely from experimental laboratory research and the potential for using contextual variability to provide insight into developmental processes was important in changing the focus of developmental psychology.