Third-Grade Seamus Has Been Referred for a New Behavioral Intervention

Third-grade Seamus has been referred for a new behavioral intervention plan that uses teacher nonverbal signals to reinforce the target child's appropriate behavior. Mr. Matthews, the school psychologist, decides to observe and record Seamus's behavior in the regular classroom and in Art and Music class. He records off-task behavior, calling out, and touching others for eight days. Mr. Matthews is involved in which phase of a multiple baseline study.

A) Implementing treatment
B) Establishing baseline
C) Seeking generalization
D) Assessing variability