What type of research method involves combining findings from different studies?

• A. Longitudinal study
• B. Case study
• C. Meta-analysis
• D. Experimental design

Answer: (C)

The method that involves combining findings from different studies is meta-analysis. This research approach systematically reviews and synthesizes research findings from various studies to draw more robust conclusions than those possible from individual studies alone. Researchers utilize statistical techniques to evaluate the data, allowing for a higher-level understanding of the effects or outcomes observed across multiple studies on a given topic.

Meta-analysis provides a way to integrate diverse research results, often uncovering patterns or effects that may not be evident in singular studies due to smaller sample sizes or varying methodologies. This method increases the overall power of a study, as it pools data from several sources, enabling researchers to draw more definitive conclusions about the subject matter.

In contrast, longitudinal studies track the same subjects over time to observe changes, case studies provide in-depth examinations of individual cases, and experimental designs involve manipulating variables to establish cause-and-effect relationships. Each of these methods serves different purposes in research and does not focus on synthesizing multiple independent study results like meta-analysis does.