Twin and Adoption Studies Suggest That Differences in Shared Environments

question 3

Multiple Choice

Twin and adoption studies suggest that differences in shared environments e.g., overall family, warmth, social class, and other features of the family environment that siblings share) account for approximately what percentage of the variance of trait scores?

• A) 70%-80%
• B) 40%-50%
• C) 20%-25%
• D) 0%-5%

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Definitions:

Automatic Functions

Bodily processes or actions that occur without conscious thought, such as breathing, heart rate, and digestion.

Brain Stem

The part of the brain connecting the spinal cord with the forebrain and cerebrum, controlling vital functions such as breathing and heart rate.

Base of the Skull

The inferior portion of the skull upon which the brain rests, consisting of several bones that include the occipital, sphenoid, and parts of the temporal bones.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back, transmitting neural signals between the brain and the body.