A major drawback associated with PET scans is that
A) they are not accurate.
B) they are dangerous.
C) they take a long time to acquire data.
D) they cannot detect which brain regions are active during a task.
Answer: C
Rationale: Positron Emission Tomography (PET) scans use low levels of radioactive glucose that is injected into the blood to visualize which areas of the brain are engaged by various tasks. A drawback is that PET scans take a long time to acquire—which is a problem when you want to see moment-by-moment activity of the brain.
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Stereotype threat refers to:
a. the poor performance on IQ tests by members of certain groups. b. the fear that a person feels about his or her performance, due to negative stereotypes about his or her group's abilities. c. the knowledge or awareness of one's own cognitive processes, and the ability to monitor and control those processes. d. the stereotype that minorities are less intelligent than others.
Sheila almost got hit by a car at a street corner because she was too busy texting on her phone. From that day on, Sheila looks before she reaches the street corner. Her change in behavior is a result of
a. learning. b. memory. c. motivation. d. both sensation and perception.