TIME OUT is a participant assisted system and process that can help participants learn to modify their inappropriate behavior in the classroom andor in life. The barrier can include a fastener and a wall, wherein the fastener is capable of positioning the wall inside or on the outer arcuating edge of the protective collar. At the lower portion of the wall a substrate engaging means is provided with lateral edges which are stabilized for securement to the surface on which the target lies while the chamber is brought into its full configuration by wall support means.