PSY 224 Lecture Notes - Lecture 2: Acne Vulgaris, Menarche, Twin Study
Document Summary
More sweat glands (skin more oily, acne) Although ti(cid:373)i(cid:374)g is ge(cid:374)erally (cid:374)ot related to perso(cid:374)"s ulti(cid:373)ate stature, Early maturers tend to be a bit heavier. Late maturers tend to be a bit taller. Still, best predictor of adult stature is child stature. Genetics dictate a certain window of time. Specific region on chromosome 6 is one of the markers for pubertal timing in both males and females. Physical and psychological health also play a role. A critical amount of body weight or fat is hypothesized to trigger onset of puberty. Females - for menstrual cycle to begin and continue. 106 lbs. plus or minus 3 lbs. Stress - seems to speed up puberty (by affecting hormonal secretions) Those in less cohesive, more conflict-ridden family environments. Girls from families with a of psychopathology in mothers. Step-father presence is stronger predictor than biological father absence. Earlier puberty over the last 150 years.
