After this training session, the sessions that follow will include the child. The sessions are held in a playroom, with the child playing with one parent at a time. Meanwhile, the therapist and the other parent will be observing the play through a one-way mirror or video system. The therapist can provide immediate feedback and suggestions through a “bug-in-ear” device or sit in the room to do the coaching. At the end of the session, the therapist discusses the child's progress, using summary sheets that parents can use to guide their interactions during practice sessions at home. These practice sessions serve as a “homework assignment” for parents, during which they practice the interaction with their child for five minutes a day, using homework sheets to track progress. The treatment begins with the Child-Directed Interaction phase, then is followed by the Parent-Directed Interaction (PDI) phase.