What percentage of children have ADHD?

Sima is a child of recent immigrants to the U.S. Sima is likely to demonstrate which of the following?

a) higher grades in school than nonimmigrant children b) a higher level of self-esteem than nonimmigrant children c) relatively higher socioeconomic status d) a high level of popularity among peers

In Schaie's view, childhood and adolescence is to acquisitive as young adulthood is to:

a. executive b. responsible c. achieving d. reintegrative