Which type of research emphasizes the collection of measurable data through experiments?

Experimental research is characterized by its emphasis on the collection of measurable and quantifiable data through controlled experiments. This type of research involves manipulating one or more independent variables to observe the effect on a dependent variable, allowing researchers to establish cause-and-effect relationships. The key aspect of experimental research is that it utilizes systematic procedures and often involves a hypothesis that can be tested through direct experimentation.

In contrast, other types of research focus on different methodologies. Descriptive research aims to provide a comprehensive overview or account of a subject without manipulating variables, historical research investigates events or phenomena from the past through primary and secondary sources rather than experimentation, and qualitative research gathers non-numerical data to understand concepts, thoughts, or experiences, relying on interviews, observations, and textual analysis. Therefore, the distinctive feature of experimental research lies in its methodological framework that prioritizes measurable outcomes obtained through rigorous experimentation.