Inherent risk factors can easily be modified through diet and exercise

Which is NOT an advantage of correlational research compared to experimental research?

a. Some problems cannot be studied using an experimental design. b. Researchers can collect more information in a correlational study. c. Correlational studies allow the researcher to draw causal conclusions. d. Researchers can test more relationships between variables than they can in experiments.

Duncan is addicted to heroin and has to keep increasing his dosage to get the same effects. This effect of addiction is called ____

a. ?psychoactive dependence b. ?psychological independence c. ?drug tolerance d. ?habituation