People behave in ways that get what they want or need, or to get away from something, someone or some place they do not want. People do not engage in problem behaviors because they have mental illness, conduct disorders, developmental disabilities or other cognitive disabilities. They engage in behaviors that have worked for them.
People do not "have" behaviors; rather, they use behavior for specific reasons.
One goal of the professional is to create environments and relationships that support therapeutic alternatives to problem behaviors.