We only collect natural, authentic, 'in-the-wild' emotional responses. Because of this, not all recorded sessions will be good enough for a reliable emotions reading, for a variety of reasons – people moving out of the frame, or covering their face, for example.

We therefore enforce strict quality filters to ensure we only include the data for high quality sessions in the final data set. We generally see that about 15-25% of the total collected sessions are excluded from analysis due to poor lighting or other interferences.