Introduction to Psychology
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Transcript Introduction to Psychology
Introduction to Psychology
Class 6: Nature and Nurture
Myers: Pages 75-85, 90-93
June 20th, 2006
Definition
Nature: Genetic and various inborn
biological factors
Nurture: Any non-genetic/ environmental
factor
-
Prenatal environment
Early experience
Peer influence
Culture
Behavior Genetics: The study of the relative
power and limits of genetic and
environmental influences on behavior
Classification
Predominantly
genetic
- Eye color, blood type
Predominantly
environmental
- Language, religion
Interactional
- Height, weight, skin color, IQ test results
Phenotype, Genotype
The phenotype of an organism is its
total physical appearance and
constitution or a trait or a behavior
The genotype of an organism is the
specific genetic makeup in the form of
DNA
Heritability
Genotype + Environment Phenotype
HERITABILITY
Twin Studies: Identical twins (MZ) have
the same genotype and fetal
environment and so differences are
solely due to environmental factors
Schizophrenia
So it is highly heritable
But the environment is important
- Stress
- Urbanization
Hutchinson & Haasen (2004) study of W.
European immigrants
“Nurture” may be a trigger to express
“nature”
IQ
Gender
John or Joan?