Time outs of at least one hour in length are recommended for effective behavior modification for children's misbehavior.

Time Outs

A disciplinary technique used to remove an individual from an environment for a period of time as a consequence for unacceptable behavior, with the goal of decreasing that behavior.

Behavior Modification

The use of empirically demonstrated behavior change techniques to improve behavior, such as altering an individual's behaviors and reactions to stimuli.