Carmen Has Been Diagnosed with Major Depression

Multiple Choice

Carmen has been diagnosed with major depression. Her twin sister Consuelo does not have the disorder. When asked if their parents suffer from major depression, researchers are likely to reduce bias in reporting by ____.

A) interviewing the twins together at the same time
B) interviewing each twin at least twice and at different points of time
C) refraining from contacting their parents
D) refraining from administering a psychological assessment