Słowa kluczowe: experience of loneliness, strategies of coping with loneliness, spouses, health behaviour, early adulthood, late adulthood, education, future time perspective, consideration of future consequences, formal operator thought, music, time, time estimation, perceived time, adolescence, self-knowledge, self-esteem, locus of control, action control level, consumer socialisation, cognitive development, theory of mind, persuasion, advertising, perspective-taking, social cognition, joint engagement, pointing