Answer:
Survey Research
Explanation:
Survey Research is a type of research that involves the use of surveys to collect data. It is a quantitative approach by which list of questions are administered by phone, in person, paper or online, to a certain group of people or a population, for the purpose of getting data about a particular topic or issue. This method of research is flexible and can involve a wide variety of applied questions to pool data together.
From the example, Dr Perry made use of survey research.