To Determine Whether a New Drug Decreases Self-Injurious Behavior,the Researcher

Multiple Choice

To determine whether a new drug decreases self-injurious behavior,the researcher measures the self-injurious behavior of 3 children,and then gives the drug to the first child after one week.After two weeks of baseline,the second child gets the drug and after 3 weeks of baseline,the third child gets the drug.This is an example of a(n) ___________ design.​

A) ​multiple baseline across subjects
B) ​changing criterion
C) ​multiple baseline across behaviors
D) ​alternating treatments