______ theory holds that the interactions of biological, psychological, and cultural factors influence the intensity and duration of pain

Despite Cattell's perception, personality tests using the T-data technique are _____ because of the biases that affect scoring and interpretation

a. subjective c. objectionable b. realistic d. optimistic

Cameron suffers from depression. A doctor is likely to give her a medication that increases the availability of __________ in her brain

a. acetylcholine b. dopamine c. endorphins d. serotonin