Solitude – the state of being alone and not physically with another – can be rewarding. The present research explored the potential benefits of solitude from a pragmatist approach: a ground-up, top-down perspective that is receptive to new knowledge but informed by theory. Participant recruitment was stratified by age and gender, and the sample involved 2,035 individuals including adolescents (13–16 years), adults (35–55 years), or older adults (65+ years). Data were analyzed with a mixed-methods approach. Coded themes from brief narratives about solitude were extracted, and their frequencies (i.e., their salience to participants) were compared across the lifespan. Themes were then correlated with two indicators of well-being in solitude: self-determined motivation for solitude and peaceful mood. Several prominent themes emerged when talking about time spent in solitude. With the exception of feeling competent in solitude, which was described frequently but consistently unrelated to self-reported well-being regardless of age, benefits of solitude tended to shift over the lifespan. Some qualities, such as a sense of autonomy (self-connection and reliance; absence of pressure), were salient and consequential for everyone, but increasingly so from adolescence to older adulthood. Older adults also reported feeling most peaceful in solitude and described their social connection and alienation less frequently, suggesting they see solitude and social time as more distinct states. Findings are discussed in light of existing work on solitude across the lifespan, and theoretical frameworks that spoke well to the data (e.g., self-determination theory).

What does it mean to be in solitude? Researchers building this nascent field are learning much about the potential affordances of solitude, but lack an agreed-upon definition or set of definitions. Arriving at that meaning is crucial to forming a solid foundation for studies that use both naturalistic and laboratory designs to explore outcomes of solitude. This study identified themes from semi-structured interviews with adults aged 19 to 80 from diverse backgrounds. We concluded that solitude is a state in which the dominant relationship is with the self. If not physically alone, people in solitude are mentally distanced from others and away from active technology-mediated interactions. Complete solitude involves both physical separation and inner focus, but solitude is best defined through a taxonomy that recognizes physical separation and internal focus as independent, sufficient characteristics. An internal focus benefits from (but is not defined by) balancing solitude with social time, quiet, and choice.

Solitude—spending time alone and not interacting with others—may be conducive to well-being and personal growth because individuals take the opportunity to self-connect. This chapter argues that self-determination theory provides a useful framework for understanding the dispositional and situational conditions for positive solitude, and why benefits arise. The chapter reviews the roles of preference, self-determined motivation, and choice as reasons individuals may find themselves alone, and it explores personal capacity for solitude as driven by an autonomous orientation. It offers a conceptual model describing positive characteristics of solitude, including quietude, fewer social demands, and less imposed structure, and links those with a number of affordances of solitude, namely, choice, freedom from pressure, and self-connection. In solitude, we can feel empowered to think, feel, and do what we want, and exercising those choices can foster a feeling of self-connection that promotes awareness, understanding, and personal growth.