  Affective sharing within groups strengthens coordination and empathy, leads
to better health outcomes, and increases productivity and performance. Existing
tools for affective sharing face one main challenge: creating a representation
of collective emotional states that is relatable and universally accessible. To
overcome this challenge, we propose HeartBees, a bio-feedback system for
visualizing collective emotional states, which maps a multi-dimensional emotion
model into a metaphorical visualization of flocks of birds. Grounded on
Affective Computing literature and physiological sensing, we mapped
physiological indicators that could be obtained from wearable devices into a
multi-dimensional emotion model, which, in turn, our HeartBees can make use of.
We evaluated our nature-inspired interactive system with 353 online
participants, whose responses showed good consensus in the way they
subjectively perceived the visualizations. Last, we discuss practical
applications of HeartBees.
