A deep learning approach to estimating interaction levels in face-to-face lessons. - Danilo Valdes-Ramirez; Jesus Alfonso Beltran-Sanchez; Santiago Enrique Conant-Pablos; Roberto Ponce Lopez; Angeles Dominguez; Claudia Camacho-Zuñiga; Genaro Zavala (Comput. Educ. Artif. Intell., 2026)