1. Schroeder, N., Adesope, O.O., Barouch Gilbert, R.: How effective are pedagogical agents for learning? a meta-analytic review. J. Educ. Comput. Res. 49(1) (2013). https://doi.org/10.2190/EC.49
2. Adamo, N., et al.: Multimodal affective pedagogical agents for different types of learners. In: Russo, D., Ahram, T., Karwowski, W., DiBucchianico, G., Taiar, R. (eds.) Intelligent Human Systems Integration 2021. AISC, vol. 1322, pp. 218–224. Springer, Cham (2021). https://doi.org/10.1007/978-3-030-68017-6_33
3. Kim, Y., Baylor, A.L.: Pedagogical agents as social models to influence learner attitudes. Educ. Technol. 47(01), 23–28 (2007)
4. Noroozi, F., Kaminska, D., Corneanu, C., Sapinski, T., Escalera, S., Anbarjafari, G.: Survey on EMOTIONAL BODY GESTURE RECOGNITION. IEEE Trans. Affect. Comput. 1–20 (2018)
5. Buchanan, A.: Facial expressions for empathic communication of emotion in animated characters. Animation studies (2009). https://journal.animationstudies.org/andrew-buchanan-facial-expressions-for-empathic-communication-of-emotion-in-animated-characters/