Which research method involves collecting non-numerical data to understand concepts or experiences?

The correct answer is based on the nature of qualitative research. This method is specifically designed to gather non-numerical data, focusing on understanding concepts, experiences, and phenomena from the perspective of the participants. Qualitative research employs various techniques such as interviews, focus groups, and observations, allowing researchers to explore the depth and richness of human behavior and social interactions.

In contrast, quantitative research focuses on numerical data and statistical analysis to draw conclusions or identify patterns. Survey research often employs quantitative methods to collect data through structured questionnaires, while experimental research typically involves manipulating variables to observe outcomes in controlled settings, often relying on numerical measurement. Each of these methods serves different purposes; however, qualitative research is unique in its aim to capture the complexities of human experiences without reducing them to mere numbers.