According to [the traditional] explanation [of behavior problems], our task is to correct disturbed personalities, change troubled states of mind, make people feel wanted, give them purpose or a sense of pride in their work, allay their frustration, and teach them the value of order, security, and affluence. But we have no direct access to states of mind, feelings, purposes, attitudes, opinions, or values. What we do is try to change the behavior from which we infer things of that sort, and we change it only by changing the environment, verbal and nonverbal, in which young people live. (p. 469)
