Table 1.

Summary of related research.

Ref.	Related Work	Signal Type	Subject Number	Stimulation Materials	Accuracy
[10]	Quiroz, J.C., Geangu, E., & Yong, M.H. (2018)	Walking sensor data and heart rate data	50	Audio-visual and audio	Higher than 78% (happiness vs. sadness)
[11]	David Pollreisz and Nima Taheri Nejad (2008)	EDA, SKT, HR	10	Emotion video	64.66% (simpler)
[12]	Zhan Zhang et al. (2016)	Walking data	123	Film chip	91.3% (neutral vs. angry), 88.5% (neutral vs. happy), 88.5% (happy vs. angry)
[14]	Xu Ya (2010)	ECG, HR	300	Video	Happy (80.38%)
[15]	Tengfei Song et al. (2019)	ECG	23	Video	Joy, sad, neutral (50.66%)