All of the following are normal physical changes associated with aging EXCEPT
A. sleeping less.
B. obesity.
C. paler, less elastic skin.
D. higher blood pressure.
Answer: B
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Among identical twins, the concordance rate for schizophrenia is about 48%; among fraternal twins it is about ______.
A. 55% B. 45% C. 25% D. 17%
Individuals who buy lottery tickets on a regular basis are usually on a __________ schedule of reinforcement
a. variable-ratio c. fixed-interval b. variable-interval d. fixed-ratio
Steven suspects that responding to e-mail increases stress. He sets up a computer program to randomly e-mail people to participate in his study. He recognizes that different groups of people may respond to stress differently, so his program is designed to e-mail an equal percentage of men and women. What is Steven’s null hypothesis?
What will be an ideal response?
Social cognition is defined as the
a. changes in a person's behavior induced by the presence or actions of others. b. process of thinking about ourselves and others in a social context. c. compulsion by members of decision-making groups to maintain agreement, even at the cost of critical thinking. d. deliberate attempt to change attitudes or beliefs with information and arguments.