What kind of illusion is demonstrated by the experience of an afterimage?

A researcher who wants to know whether drinking caffeine causes increased energy would be most likely to conduct what type of study?

a. An archival study b. An experimental study c. A correlational study d. An observational study

The text presents the story of Vang Xiong, a Hmong refugee who almost succumbed to sudden death syndrome. What treatment appears to have helped his symptoms disappear?

a. A Hmong healer interpreted his problems as being caused by unhappy spirits and she performed ceremonies to release the spirits. b. A psychiatrist prescribed SSRIs and benzodiazepines for his symptoms and followed up with cognitive-behavioral therapy. c. A psychoanalyst interpreted his symptoms as survivor's guilt, which helped him work through his problems. d. A cognitive-behavioral therapist helped him deal with his problems through confrontational role playing and learning relaxation techniques.