A chancre is the major symptom of all stages of syphilis

Approximately what percentage of schizophrenic patients are noncompliant with their medication regimen?

a. 25% b. 50% c. 75% d. 10%

The expectations of a researcher that might distort or influence his or her interpretation of what he or she actually observed is called ______

a. the Phi phenomenon b. sample bias c. observer bias d. cognitive dissonance