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Adult development encompasses the changes that occur in biological and psychological domains of human life from the end of adolescence until the end of one's life. Changes occur at the cellular level and are partially explained by biological theories of adult development and aging. [ 1 ]
Emerging adulthood relationships carried on for an average of 21.3 months compared to adolescence, which averaged at 5.1 and 11.8 months. Montgomery and Sorell (1994) did a study on romantic love and it reported that unmarried emerging adults would be more dominating, clingy, possessive, and dependent compared to young and married couples who ...
Piaget's test for Conservation. One of the many experiments used for children. Developmental psychology is the scientific study of how and why humans grow, change, and adapt across the course of their lives. Originally concerned with infants and children, the field has expanded to include adolescence, adult development, aging, and the entire ...
The formal study of adolescent psychology began with the publication of G. Stanley Hall's Adolescence in 1904. Hall, who was the first president of the American Psychological Association, defined adolescence to be the period of life from ages 14 to 24, and viewed it primarily as a time of internal turmoil and upheaval (sturm und drang). [90]
Research has also demonstrated that changes in Big Five personality traits depend on the individual's current stage of development. For example, levels of agreeableness and conscientiousness demonstrate a negative trend during childhood and early adolescence before trending upwards during late adolescence and into adulthood. [119]
Particularly in Western societies, modern legal conventions stipulate points around the end of adolescence and the beginning of early adulthood (most commonly 16 though ranging from 14 to 21) when adolescents are generally no longer considered minors and are granted the full rights and responsibilities of an adult.
Jean Piaget's cognitive developmental theory describes four major stages from birth through puberty, the last of which starts at 12 years and has no terminating age: [11] Sensorimotor: (birth to 2 years), Preoperations: (2 to 7 years), Concrete operations: (7 to 11 years), and Formal Operations: (from 12 years). Each stage has at least two ...
Human adulthood encompasses psychological adult development. Definitions of adulthood are often inconsistent and contradictory; an adolescent may be biologically an adult and display adult behavior but still be treated as a child if they are under the legal age of majority.