Rebekah first developed the ability to control her head. She then could sit up unassisted and eventually could walk. This progression of motor development is called the __________.

For Ellis, what are the two types of psychological disturbance?

A. Ego and denial disturbances. B. Ego and dysfunction disturbances. C. Ego and discomfort disturbances. D. Ego and displacement disturbances.

Ben has an IQ of 20, which most likely would place him in which category of retardation?

a. mild b. moderate c. severe d. profound