According to DSM-5 criteria, a person can only be diagnosed as having intellectual disability if he or she has an IQ that is below approximately

In the ancient Greek typology, melancholics were considered to be:

a. touchy b. restless c. careful d. pessimistic

Lisa asks her nine-year-old daughter Erica the following hypothetical question: "How would the world change if people woke up tomorrow and discovered they could fly?" Erica immediately responded: "But people can't fly!" Erica's answer indicates that she has not reached the stage of:

A. conservation B. preoperations C. concrete operations D. formal operations