Ключевые слова: 20 to 24 years, 2024 years, caucasian ethnicity, communication, day, dialing, four people, higher education student, holding, leisure, lying down, male, man, may 2013 release, men, mobile phone, numeral, orthographic symbol, outdoors, reclining, relaxation, resting, small group of people, smart phone, smartphone, student, summer, symbol, telephone, text message, text messaging, using, young adult, young man, young men,