In a ______ design, research subjects are unaware as to whether they are assigned to the experimental group or the control group.

What are the advantages to using brain imaging techniques?

A. They can rule out neurological conditions and can help researchers explore the relationship between brain functions and specific mental disorders. B. They can define and determine the severity of almost any disorder. C. They can accurately diagnose the patient without other data. D. They are inexpensive to conduct and can take the place of psychological assessments.

Which research approach is probably the best for exploring the genetic contribution to personality?

A) comparing identical twins who were reared apart B) comparing children adopted into another family with their siblings who remained with their birth parents C) comparing fraternal twins D) comparing identical twins who were raised in the same household