Dr. Kalini is a researcher who studies the areas of the brain important in the stages of sleep. Dr. Kalini is in the field of __________

Observational studies can occur _____

a. only in the lab b. only in a natural setting c. in a lab or in a natural setting d. only by video recording participants

When marijuana is abused, the resulting effects are most likely to include:

a. throat and lung irritation, and impaired memory. b. impaired motor and sensory function, as well as impaired permanent storage of new information, withdrawal symptoms, and possibly death. c. loss of appetite, nausea, constipation, withdrawal symptoms, and possibly death. d. psychosis, paranoia, and panic reactions.