An individual whose gender-role identity is ________ would perceive herself or himself as having both feminine and masculine traits

Kayla and Layla are twins who were separated at birth

A researcher interested in studying heredity tracks them down and speaks to their different families about the benefits that can be achieved by studying the two young girls. The girls and their different sets of parents agree to participate, and studies begin assessing various areas of the girls' lives. In order for this type of twin study to be most effective, what kind of twins should Kayla and Layla be? A) conjoined B) monozygotic C) amorphous D) dizygotic

_____, a professor of psychology at Stanford University, revised the Binet-Simon scale and released it in a form that is still used today (in its fifth edition)

A) William Stern B) Lewis Terman C) Henri Simon D) David Wechsler