Which of the following studies would have the highest external validity?
a. A researcher sends individuals a survey in the morning and at night to see what time of day they are most likely to participate in a study.
b. A researcher goes to the library to observe whether individuals are quieter in the morning or evening.
c. A researcher invites individuals to the laboratory to observe whether individuals are happier in the morning or evening.
d. A researcher brings participants into the laboratory and asks them to report whether they talk more in the morning or evening.
Ans: B
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Systems theory acknowledges that multiple contributions are important to causality and that they also
a. focus on childhood experiences. b. are unconscious conflicts. c. focus on physical illnesses. d. are interdependent.
What do night terrors and sleepwalking have in common with each other?
a. They become more common in old age. b. They result from a lack of orexin in the brain. c. They occur as a result of obesity. d. They occur during non-REM sleep.
Recent studies have reported an unexpected link between cannabis use and
a. severe mood disorders, including bipolar disorder. b. the onset of some dementias, including Alzheimer's disease. c. severe psychotic disorders, including schizophrenia. d. the onset of some motor system disorders, including Parkinson's disease.
Broca's research in craniometry found erroneously that:?
a. ?the brain is smaller in mature adults b. ?the brain is larger in eminent men and supposed superior races c. ?the brain is larger in women d. ?there is no relationship between intelligence and the volume of the brain