A total of 503 articles were extracted and 77 were selected, of which 40 investigated the Personal Digital Assistant PDA, 13 the clicker Student Response Wireless System, and six the smart phone.
Se extrajeron 503 artículos y se seleccionaron 77, de los cuales, 40 investigaron la PDA Personal Digital Assistant, 13 el clicker Sistema inalámbrico de Respuesta del Estudiante y 6 el teléfono inteligente.