Which statement best characterizes a between-subjects experimental design?
a. Participants are randomly selected from two different populations.
b. Each participant is assigned to one condition of the experiment.
c. Each participant is assigned to every condition of the experiment.
d. Participants are assigned to a random number of conditions.
b
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What conclusion should be reached about the effectiveness of Head Start programs?
A. Head Start programs show few short-term gains for students, with benefits not recognizable until high school B. Despite decades of research, no demonstrable gains have been demonstrated for Head Start programs. C. Across both short- and long-term periods, the evidence of benefits is mixed. D. Head Start programs show clear short-term benefits, and these become stronger through the middle school years.
Most people are highly susceptible to hypnosis
Indicate whether the statement is true or false
This hypothesis suggests that dreams are simply the brain's attempt to make sense of the random firing of brain cells during REM sleep
a) REM regeneration hypothesis b) activation-synthesis hypothesis c) dopaminergic hypothesis d) Freudian cathartic hypothesis
Dr. Zelman conducts research that explores the relationship between alcohol consumption and driving ability. He runs participants through a driving obstacle course after they consume various amounts of alcohol
He concludes that the more alcohol a person consumes, the more impaired their driving will be. Because his results can be generalized to the larger population from which his sample was drawn, his study would be described as having high __________ validity. a. applicable b. general c. external d. criterion