Sandra is so preoccupied with perfection that she almost never gets things done on time. Socially, she rarely goes out because she is usually working. She is rigid about her daily schedule. Sandra may qualify for a diagnosis of

Tony, age 77, married Nichole, age 24. They are not using birth control because of Tony's advanced age. You can advise them that

A) Tony probably stopped producing semen around age 70. B) Tony produces less semen and sperm, which negatively affects fertility, but he can probably still father children. C) While Tony still produces semen, he probably stopped producing sperm around age 70. D) Tony cannot maintain a sufficient erection to father a child at his age.

As a psychology student, you have very limited funds and time to conduct your research project. However, because you are testing consumer preference for shoe style, you know you should balance the presentation of Shoe A and Shoe B

Which control method would you choose? a) Within-group counterbalancin b) Within-subject counterbalancing c) Elimination d) Randomization