Ключевые слова: adults, attention, attentive, audience, auditorium, backs, board, business, businessmen, casual, collaboration, colleague, colleagues, crowd, expertise, explaining, front, gesturing, group, hand, individuality, knowledge, large, leadership, learn, lecturer, listeners, male, meeting, mid, multiethnic, people, plan, presentation, row, screen, seated, selective, seminar, sitting, space, speaker, speaking, strategy, suit, three, watching, whiteboard, woman, working,