It measures 7 core emotions (joy, anger, fear, disgust, contempt, sadness, and surprise)
Facial expression analysis is an indirect measurement technology. It measures and records voluntary and involuntary movements of facial muscles, but does not use sensors. The facial expression analysis allows you to test the impact of any content, product or service that is intended to produce emotional and facial reactions.
The key difference is that there is no need to mount sensors on the participants ' face because a web camera is responsible for capturing facial micro expressions (voluntary and involuntary) related to specific cognitive and emotional states when participants are exposed to stimuli such as video ads, movie trailers for analysis.
Such performance measures have values of probability to reflect the likelihood of expressing the desired emotion. It also offers summary scores of engagement and valence, giving you an overview of the overall response expressed