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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.
Mathematical modeling is useful in developmental psychology for implementing theory in a precise and easy-to-study manner, allowing generation, explanation, integration, and prediction of diverse phenomena. Several modeling techniques are applied to development: symbolic, connectionist (neural network), or dynamical systems models.
Erikson's stages of psychosocial development, as articulated in the second half of the 20th century by Erik Erikson in collaboration with Joan Erikson, [1] is a comprehensive psychoanalytic theory that identifies a series of eight stages that a healthy developing individual should pass through from infancy to late adulthood.
This category contains theories of how a psychological aspect of human development progresses. While these theories are often in discrete stages, they are not always, but they do always cover how a person's development would progress as they age.
The theory considers the lifelong accumulation of developmental additions and subtractions, with the relative proportion of gains to losses diminishing over an individual's lifetime. [14] According to this theory, life span development has multiple trajectories (positive, negative, stable) and causes (biological, psychological, social, and ...
Raison oblige theory; Range–frequency theory; Realistic conflict theory; Reasoned action approach; Reciprocal determinism; Regulatory focus theory; Regulatory mode theory; Reinforcement sensitivity theory; Relational developmental systems; Relational frame theory; Relational models theory; Relational-cultural therapy; Remote Associates Test ...
Teachers can use Piaget's theory to see where each child in their class stands with each subject by discussing the syllabus with their students and the students' parents. [80] The stage of cognitive growth of a person differ from another. Cognitive development or thinking is an active process from the beginning to the end of life.
Physical development. Typically grows between 1 and 1.5 inches (2.5 and 3.8 cm) and gains about 2 pounds (910 g). [20] Motor development. Hands kept in tight fists. [21] Equal movement of arms and legs on both sides. [21] Able to briefly hold up head when in prone position. [21] Arm thrusts are jerky. [22] Brings hands close to eyes and mouth. [22]