Answer:
repeated measures design
Explanation:
A research design can be defined as the blueprint, framework (methods and procedures) or total strategy that are used in the collection and analysis of variables and in turn effectively addressing the research problem.
A repeated measures design is a type of research design. it involves the use of different measures of a variable on a subject that is also the same. it is very essential has it has the tendency to control factors that can cause/influence variability among the subject understudy. it is also called within subject design.