Final answer:
A multiple baseline across people design involves observing and measuring behavior across several individuals, introducing the treatment at different times to evaluate its effect.
Step-by-step explanation:
A multiple baseline across people design is a research design that involves observing and measuring behavior across several individuals, introducing the treatment at different times to evaluate its effect. This design allows researchers to determine if the treatment has a consistent and replicable effect across different individuals. For example, a researcher might study the effects of a new teaching method on reading comprehension by introducing the method to one student at a time and measuring their improvement.