The term "Data already collected for some purpose other than the current study" refers to Secondary Research.
Secondary research involves the use of existing data that was gathered for other research purposes. This can include data from previous studies, reports, articles, and other resources that provide valuable information for the current research project.
In contrast, Primary Research involves the collection of original data specifically for the purpose of the current study. This includes methods such as surveys, interviews, experiments, or observations tailored to answer specific research questions.
So, the correct response is: Secondary Research.