Final answer:
Gottesman and Shields (1966) conducted a twin study to investigate the heritability of schizophrenia.
Step-by-step explanation:
The study conducted by Gottesman and Shields (1966) focused on examining the role of genetics in psychopathology. They conducted a twin study to investigate the heritability of schizophrenia. The researchers examined the concordance rates for schizophrenia in identical twins (who share 100% of their genes) and fraternal twins (who share 50% of their genes). The study provided evidence for the genetic component of schizophrenia.