Which criterion is used to determine whole brain death?
A. incoherent speech
B. lack of response to painful stimuli
C. motor reflexes that diminish over 10 min
D. flat electroencephalogram for at least 5 min
Answer: B
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Why is random assignment used in between-subjects experimental designs?
a. to hold participant characteristics constant b. to ensure a nonbiased sample c. to ensure anonymity of the research participants d. to eliminate systematic differences between the groups
Studies show that over 60% of adults in the United States and England get at least 30 minutes per day of exercise
Indicate whether this statement is true or false.
Psychologists who study children's cognitive development in a range of environments have found that
A. the cognitive skills of disadvantaged children can be improved by providing the children with extra lessons, stimulating materials, and educational contact with sensitive adults. B. preschool programs have robust and enduring effects. C. the environment does not influence cognitive development beyond the first two years of life. D. once intellectual development has been impaired, there is no hope of reversing the damage.
Sara is high in the personality trait that best predicts who will live the longest. Which one is it?
a. extraversion b. openness to experience c. agreeableness d. conscientiousness