Which of the following is the correct formula for determining one's intelligence quotient (IQ), a measure that was first employed in intelligence testing by Lewis Terman in 1916?

Attention-deficit/hyperactivity disorder is ______

a. more common in boys than in girls b. more common in girls than in boys c. equally common in boys and girls d. not usually diagnosed in girls and boys until adolescence

Five-year-old Johan has very high self-esteem. His parents wonder whether this will change once he enters elementary school. Most likely, Johan's self-esteem will

A) continue to rise, as long as he does not engage in social comparison with his peers. B) maintain its current level, but will slowly decline in the areas of peer relationships and athletic competence. C) continue to rise until he makes the transition from elementary to middle school. D) decline over the first few years of elementary school, but will likely rise after fourth grade.