This guide describes methods to help parents and others reduce the unacceptable behaviors of children with multiple sensory impairments and replace those behaviors with acceptable ones. The guide recommends that the behavior change program begin with simple changes so that both the parents and the child gain experience in changing behavior. The guide is based on the principle that children act or behave to meet their needs and that behavior is not "good" or "bad" but rather "acceptable" or "unacceptable." Behaviors targeted for change must be objectively identified, antecedent events must be observed, and the level of the target behavior must be measured. A behavior change program can then be designed, involving positive reinforcement, prompting, shaping, and maintenance and generalization techniques. Unacceptable behaviors can be reduced by identifying the consequences that follow from the child's unacceptable behavior and eliminating them. Existing techniques for decreasing unacceptable behavior include extinction techniques, rewarding an incompatible (acceptable) behavior, time-out, overcorrection, and severe punishment (not recommended and addressed only because some parents do resort to it). (JDD)