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  2. Half-life of knowledge - Wikipedia

    en.wikipedia.org/wiki/Half-life_of_knowledge

    An engineering degree went from having a half life of 35 years in ca. 1930 to about 10 years in 1960. [ 1 ] A Delphi Poll showed that the half life of psychology as measured in 2016 ranged from 3.3 to 19 years depending on the specialty, with an average of a little over 7 years.

  3. Adult development - Wikipedia

    en.wikipedia.org/wiki/Adult_development

    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]

  4. Psychology - Wikipedia

    en.wikipedia.org/wiki/Psychology

    Psychology is the scientific study of mind and behavior. [1] [2] Its subject matter includes the behavior of humans and nonhumans, both conscious and unconscious phenomena, and mental processes such as thoughts, feelings, and motives. Psychology is an academic discipline of immense scope, crossing the boundaries between the natural and social ...

  5. Erikson's stages of psychosocial development - Wikipedia

    en.wikipedia.org/wiki/Erikson's_stages_of...

    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.

  6. Maturity (psychological) - Wikipedia

    en.wikipedia.org/wiki/Maturity_(psychological)

    The most common age threshold is 18 years of age, with thresholds ranging from 14 to 21 across nations and between provinces. Although the age of majority is referred to as a jurisdiction's legal age, the legal ages of various other issues of legal maturity like sexual consent or drinking and smoking ages are often different from the age of ...

  7. Big Five personality traits - Wikipedia

    en.wikipedia.org/wiki/Big_Five_personality_traits

    William McDougall, writing in 1932, put forward a conjecture observing that "five distinguishable but separable factors" could be identified when looking at personality. His suggestions, "intellect, character, temperament, disposition and temper", have been seen as "anticipating" the adoption of the Big Five model in subsequent years. [8]

  8. Here’s When You Should Use an Apostrophe - AOL

    www.aol.com/only-ways-using-apostrophe-200038400...

    An apostrophe is not an accessory. Here are examples of how and when to use an apostrophe—and when you definitely shouldn't. The post Here’s When You Should Use an Apostrophe appeared first on ...

  9. Psyche (psychology) - Wikipedia

    en.wikipedia.org/wiki/Psyche_(psychology)

    Psychology is the scientific or objective study of the psyche. The word has a long history of use in psychology and philosophy, dating back to ancient times, and represents one of the fundamental concepts for understanding human nature from a scientific point of view.