Approximately what percentage of women become grandmothers by their early 50s?

Which is of the following people is most likely to suffer from generalized anxiety disorder?

a) Connie, who is also depressed and visits the doctor a great deal b) Martin, who is also depressed and visits the doctor a great deal c) Julie, who has high levels of GABA and doesn't want to seek treatment d) Charlie, who has high levels of GABA and doesn't want to seek treatment

If you study to relieve your fear of receiving an F on the upcoming test, then your studying has increased due to

a. negative reinforcement. b. positive reinforcement. c. aversive punishment. d. response cost.