A Researcher Conducts an Experiment with Mary, an 8-Year-Old Autistic

Multiple Choice

A researcher conducts an experiment with Mary, an 8-year-old autistic girl. The researcher first measures how many times Mary hits her head against a wall per day (for a total of 10 days) . Then, the researcher begins reinforcing Mary when she engages in productive behaviors (e.g., playing quietly) and does NOT hit her head against a wall. The researcher again measures how many times Mary hits her head against a wall per day (for a total of 10 days) . What kind of research design has this researcher used?

A) A-B-A
B) A-B-A-B
C) A-B
D) Interrupted time-series