(6) This “don’t go back” approach perfectly describes CIO in its “unmodified” or “total extinction” form. Some pediatricians who subscribe to this method of CIO advise parents to shut the door to their baby or toddler’s room and not open it again for a full twelve-hour period. The only caveat to this involves assuming nighttime parenting duties if the child is physically ill. Yet, throwing up due to the stress of nocturnal abandonment doesn’t constitute a sign of physical illness and parents are advised by proponents of “total extinction” CIO to clean up the vomit promptly without touching the child or displaying emotion.