In correlational research, the investigator:
a. Systematically observes two variables to see whether there is an association between them
b. Manipulates a variable under carefully controlled conditions and observes whether there are changes in a second variable as a result
c. Exposes subjects to two closely related treatment conditions
d. Simultaneously manipulates two or more independent variables
Question 2
One of the most serious and intolerable side effects of traditional antipsychotic medications is/are ___, which originally was a sign that the medication was working:
a. Hallucinations
b. Severe muscle weakness
c. Tardive dyskinesia
d. Paralysis
