Descriptive personality theory postulates that people have some personality types {personality types}. Traits can be together, or people can have main traits. The same sets are in adults and children, men and women, different social classes, and different nations.
People have body configurations {somatotype}. Researchers can identify over seventy individual body configurations, but they do not correlate with psychology or disease.
People {ectomorphy} can be thin, sociable, and outgoing, with large surface area compared to body weight. Ectomorphism relates to the personality trait dysthymia.
People {endomorphy} can be plump, pleasure seeking, and inward looking, with mostly soft and rounded tissue throughout body.
People {mesomorphy} can be muscular, active, and inward and outward looking, with mostly muscle, bone, and connective tissue.
Personality can depend on self-consciousness and diffidence {cerebrotonia}. Cerebrotonia relates to extreme ectomorphy.
Personality can depend on self-assertiveness and aggression {somatotonia}. Somatotonia relates to extreme mesomorphy.
Personality can depend on sociability and love of comfort {viscerotonia}. Viscerotonia relates to extreme endomorphy.
People {extroversion}| {changeableness} can change in response to others or environment. Galen's choleric and sanguine types are changeable, unlike his melancholic and phlegmatic types. Extroversion has resting states with low cortical arousal. Extroversion is not dominant trait. Heredity causes two-thirds of extroversion-introversion variation.
People {introversion}| can have resting states with high cortical arousal, caused by ascending reticular activating system. Introversion is not dominant trait. Heredity causes two-thirds of extroversion-introversion variation.
Extroversion and introversion {ambiversion} can mix.
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Date Modified: 2022.0225