Which evaluation method involves collecting data from group discussions?

The evaluation method that involves collecting data from group discussions is group discussions. This approach allows for gathering qualitative insights and diverse perspectives from participants, facilitating an interactive environment where individuals can share their thoughts, experiences, and feedback on a product or design. Group discussions encourage dialogue and can unveil insights that might not emerge through other evaluation methods, as they enable participants to build on each other's ideas and explore different viewpoints in a collaborative setting.

In contrast, sales and returns analysis focuses on quantitative data related to product performance in the market, user trials typically involve testing products individually to observe performance and usability, and questionnaires are structured surveys with predefined questions aimed at obtaining specific information from respondents, but they do not foster the open-ended discussion that group discussions do.