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Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [ 4 ] As of December 2021, Quizlet has over 500 million user-generated flashcard sets and more than 60 million active users.
Erik Erikson and Carl Jung proposed stage theories [2] [3] of human development that encompass the entire life span, and emphasized the potential for positive change very late in life. The concept of adulthood has legal and socio-cultural definitions. The legal definition [4] of an adult is a person who is fully grown or developed.
The development of the human mind is complex and a debated subject, and may take place in a continuous or discontinuous fashion. [4] Continuous development, like the height of a child, is measurable and quantitative, while discontinuous development is qualitative, like hair or skin color, where those traits fall only under a few specific phenotypes. [5]
A fetus is a stage in the human development considered to begin nine weeks after fertilization. [4] [5] In biological terms, however, prenatal development is a continuum, with many defining features distinguishing an embryo from a fetus. A fetus is also characterized by the presence of all the major body organs, though they will not yet be ...
The old-age life stage development reaches renunciation or a complete understanding of Dharma. [153] The current mainstream views in the psychological field are against the Indian model for human development. The criticism against such models is that the parenting style is overly protective and encourages too much dependency.
Despite the minimization of development in evolutionary theory, early developmental psychology was influenced by evolution. Both Darwin's theory of evolution and Karl Ernst von Baer's developmental principles of ontogeny shaped early thought in developmental psychology. [12]
Graph of total, average, and marginal product In economics , a production function gives the technological relation between quantities of physical inputs and quantities of output of goods. The production function is one of the key concepts of mainstream neoclassical theories, used to define marginal product and to distinguish allocative ...
Stage-crisis view is a theory of adult development that was established by Daniel Levinson. [1] [2] Although largely influenced by the work of Erik Erikson, [3] Levinson sought to create a broader theory that would encompass all aspects of adult development as opposed to just the psychosocial.