Roberto started using crack cocaine last year. At first, he only smoked a small amount, but now he requires much more to achieve the same feeling. This phenomenon is called ____

Which defense mechanism figured prominently in the theory of Alfred Adler?

a) repression b) compensation c) depression d) rationalization

Almost ________ of full-time college students work at least a few hours a week

A) three-quarters B) one-third C) one-fifth D) two-thirds