0 00:34 Stranger Anxiety: Ph3 Stranger Works with Student when Therapist is No Longer Around This phase is designed to teach students to remain calm while the stranger works with him and the familiar person leaves the room.
0 00:34 Stranger Anxiety: Ph2 Stranger Only Works with Student for the Final Token This phase is designed to teach students to remain calm during the longer presence of a stranger who is presenting some demands and reducing time with the familiar person.
0 00:34 Stranger Anxiety: Ph1 Stranger Only Provides Reinforcers and Presents No Demands This phase is designed to teach students to remain calm during the brief presence of a stranger who is bringing a preferred item.