Final answer:
In the 1950s, educators began extending maturational theories to developmental psychology, which studies development across a lifespan, including physical, cognitive, and psychosocial aspects.
Step-by-step explanation:
In the 1950s, educators became interested in extending maturational theories from process to developmental psychology.
Developmental psychology is the scientific study of development across a lifespan, focusing on physical maturation as well as changes in cognitive skills, moral reasoning, social behavior, and psychological attributes. Developmental psychologists view development as a lifelong process that can be studied scientifically across three developmental domains: physical, cognitive development, and psychosocial. They study various theories of development that focus on issues such as continuity vs. discontinuity, the course and nature of development, and the influence of nature vs. nurture.