Final answer:
The advantage of focus group interviews is that they offer multiple perspectives through group interaction, leading to rich discussions and valuable insights.
Step-by-step explanation:
One advantage of focus group interviews is that they provide multiple perspectives. By bringing together a group of individuals, focus groups harness the diversity of experiences and viewpoints of the participants. This can lead to a rich discussion and the emergence of insights that might not be as easily obtained through other methods such as surveys or individual interviews. The dynamic nature of a focus group fosters interaction among participants, allowing for ideas to be refined and expanded upon through group discussion.