Ключевые слова: 1, 1 and group, 2025, 10660107, 2025 years, 4045, 4045 years, adult, africanamericans, and, chair, classroom, concentration, education, further, further education, group, indoors, leaning, learning, lecturer, listening, man, midadult, midadult man, people, professor, sitting, smiling, standing, student, study, table, teacher, teaching, tilt, university, university student, whiteboard, whites, woman, years, young, young adult man, young adult woman,