Professor Dumbledore studies concordance rates as they affect schizophrenia. This means that he studies the ____.
a. likelihood that adopted children share more in common with their biological parents than with their adoptive parents
b. likelihood that adopted children share more in common with their adoptive parents than with their biological parents
c. likelihood that both twins of a twin pair will show the same characteristics
d. occurrence of specific diseases in the general population
Question 2
Which characteristic is considered a negative symptom of schizophrenia?
a. hallucinations
b. delusions
c. disorganized speech
d. avolition