The basic guideline for defining mental disorders is to use the viewpoint of people who are affected by the troubled individual

Dean believes that people on the street talk about him when he walks by. He also believes that the people on the bus are talking about him when he rides the bus to work. At work, he believes his coworkers standing at the water-cooler are talking about him. Dean's beliefs represent delusions of ______.

a. grandeur b. persecution c. reference d. being controlled

According to Piaget, what do adolescents employ during the formal operational stage of development that helps them reason differently than children in the concrete development stage?

a) prefrontal cortex b) additionally myelinated neurons c) propositional thought d) trial and error experience from previous years