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In psychology, developmental stage theories are theories that divide psychological development into distinct stages which are characterized by qualitative differences in behavior. [ 1 ] There are several different views about psychological and physical development and how they proceed throughout the life span.
Life-span psychology can be defined as the exploration of biological, cognitive, and psychosocial changes and constancies that occur throughout the course of life. [6] It has been presented as a theoretical perspective, proposing several fundamental, theoretical, and methodological principles about the nature of human development.
Specifically, the neo-Piagetian theories of cognitive development showed that the successive levels or stages of cognitive development are associated with increasing processing efficiency and working memory capacity. These increases explain differences between stages, progression to higher stages, and individual differences of children who are ...
According to this theory, life span development has multiple trajectories (positive, negative, stable) and causes (biological, psychological, social, and cultural). Individual variation is a hallmark of this theory – not all individuals develop and age at the same rate and in the same manner. [15] Bronfenbrenner's ecological theory
So far, empirical research from a life course perspective has not resulted in the development of a formal theory. [8] Glen Elder theorized the life course as based on five key principles: life-span development, human agency, historical time and geographic place, timing of decisions, and linked lives. As a concept, a life course is defined as "a ...
Ecological systems theory is a broad term used to capture the theoretical contributions of developmental psychologist Urie Bronfenbrenner. [1] Bronfenbrenner developed the foundations of the theory throughout his career, [2] published a major statement of the theory in American Psychologist, [3] articulated it in a series of propositions and hypotheses in his most cited book, The Ecology of ...
The neo-Piagetian theories aim to correct one or more of the following weaknesses in Piaget's theory: Piaget's developmental stage theory proposes that people develop through various stages of cognitive development, but his theory does not sufficiently explain why development from stage to stage occurs. [1]
Loevinger's stages of ego development are proposed by developmental psychologist Jane Loevinger (1918–2008) and conceptualize a theory based on Erik Erikson's psychosocial model and the works of Harry Stack Sullivan (1892–1949) in which "the ego was theorized to mature and evolve through stages across the lifespan as a result of a dynamic interaction between the inner self and the outer ...