Multimodal Affective Computing to Enhance the User Experience of Educational Software Applications

Table 2

Comparison of emotion detection technologies from facial expressions.

Name	API/SDK	Requires Internet	Information returned	Difficulty of use	Free software
Emotion API	API/SDK	Yes	Happiness, sadness, fear, anger, surprise, neutral, disgust, and contempt	Low	Yes (limited)
Affectiva	API/SDK	Yes	Joy, sadness, disgust, contempt, anger, fear, and surprise^1	Low	Yes, with some restriction
nViso	API/SDK	No	Happiness, sadness, fear, anger, surprise, disgust, and neutral	—	No
Kairos	API/SDK	Yes	Anger, disgust, fear, joy, sadness, and surprise^2	Low	Yes, only for personal use

¹Besides, it also detects different facial expressions, gender, age, ethnicity, valence, and engagement. ²Besides, it also detects user head position, gender, age, glasses, facial expressions, and eye tracking.