Lecture5 - H D 1170 Lecture 5 2/9/2010 Puberty in Boys Not...

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HD 1170 Lecture 5 2/9/2010 Puberty in Boys Not much data on first ejaculation o Current age is 12.5 in US o Kinsey data in 1948 reported age is between 13 and 14 Effect of environmental estrogens on boys o Lower sperm counts o Need more research Interaction of Heredity and Environment Genes and environment interact to create the timing of puberty Nature vs. Nurture o Research finds an interaction of genes and environment o Not nature v. nurture anymore Mechanisms of person/environment interactions: 1. Reactive 2. Evocative—a person’s personality evokes particular responses in the environment 3. Proactive—Different individuals select and construct their own environment Psychological Impact of Changes Reaction to menarche Reaction to first ejaculation Reaction to entering puberty early, on time, or late? Early and Late Maturation Early Maturing Boys o Better self image o More popular o More problem behaviors o More antisocial activities o More smoking, use of drugs, alcohol o Earlier sexual activity Early maturing girls o Poorer self image
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This note was uploaded on 02/13/2011 for the course HD 1170 taught by Professor Mary during the Spring '10 term at Cornell University (Engineering School).

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Lecture5 - H D 1170 Lecture 5 2/9/2010 Puberty in Boys Not...

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