Question

twin studies research indicates that two - thirds of personality can be attributed to
a. nonshared environments
b. shared environments
c. genetic influences
d. environmental influences
please select the best answer from the choices provided
a
b
c
d

Explanation:

Twin studies, especially those on identical (monozygotic) and fraternal (dizygotic) twins, have shown that genetic factors play a significant role in personality. Identical twins share 100% of their genes, while fraternal twins share about 50%. Research comparing these two types of twins across different environments has indicated that a large portion (around two - thirds in some estimates) of personality variance can be attributed to genetic influences. Non - shared environments (unique experiences of each twin) and shared environments (family, neighborhood) have a relatively smaller impact compared to genetics for the major portion of personality traits as per twin study research. Environmental influences (both shared and non - shared) combined do not account for two - thirds of personality in the context of twin study findings which emphasize the role of genetic inheritance.

Answer:

C. genetic influences