In which technique of data collection do several participants, including a facilitator, question a specific and defined topic, with interaction within the group and the joint construction of meaning?

The technique described is the focus group, with a facilitator guiding group interaction on a defined topic.

A case study intensively examines a single unit, not a facilitated group discussion.

Ethnography studies a culture through immersion and prolonged observation.

Ideal group is not a recognised data collection technique in research.

The focus group yields data through joint construction of meaning among participants.

Group size is usually kept between six and twelve for effective interaction.