During a retrospective meeting, the Scrum Master announces, "Let's look at what's happening in our group. You can contribute in any of the sections, but participation is voluntary. The aim is to hear from others, so no commenting on another's contribution."She then points to a poster containing five sections (Appreciations, New Information, Puzzles, Complaints, Hopes and Wishes) and allows time for people to comment. What technique is the Scrum Master Applying?

1. Critical Chain Analysis
2. Temperature reading
3. Value Stream Mapping
4. Kano Analysis