Professor Briscoe Finds That When He Smiles and Makes Eye

Multiple Choice

Professor Briscoe finds that when he smiles and makes eye contact with Jeanne,she becomes more responsive to his questions.He later tries the same behaviour on David,Chris,and then Sarah and finds that it also influences their responses to his questions.What type of study design did Professor Briscoe employ?

A) Across situations multiple baseline design
B) Across behaviours multiple baseline design
C) Across subjects multiple baseline design
D) ABA design