In trying to solve the pendulum problem, formal operational adolescents usually
A)fail to notice variables not suggested by the concrete materials of the task.
B)identify the variables and test each one separately and, if necessary, also in combination.
C)have difficulty separating out the effects of variables.
D)focus on the weight of the object, not the length of the string.
The number of American teenage births is lower than it was 50 years ago because
A)about one-fourth of adolescent pregnancies end in abortion.
B)sex education programs in public schools are more effective.
C)convenient contraceptive services are more readily available.
D)more girls today are practicing abstinence.
In response to a story about unjust parental punishment, which of the following children is
most likely to say that he or she would feel OK, rather than angry?
A)Dalaja, a Hindu girl
B)Joslyn, an American girl
C)Ashoka, a Buddhist boy
D)Samuel, an American boy