Loneliness in Emerging Adulthood: A Scoping Review

Loneliness is prevalent during emerging adulthood (approximately 18-25 years) and is an important issue given it has been linked to poorer physical and mental health outcomes. This preregistered scoping review aimed to provide an overview of the literature on loneliness in emerging adulthood, including the (a) conceptualization and measurement of loneliness, (b) loneliness theories used, (c) risk factors and outcomes examined, (d) sex-gender differences observed, and (e) characteristics of emerging adult samples previously researched. Following the Joanna Briggs Institute (JBI) guidelines, seven electronic databases were searched for articles focused on loneliness published from 2016 to 2021, where the mean age of participants was >= 18 and <= 25 years. Of the 4068 papers screened, 201 articles were included in the final review. Findings suggest the need for a clearer consensus in the literature regarding the conceptualization of loneliness for emerging adults and more qualitative work exploring emerging adults' subjective experiences of loneliness. Results highlight an over-reliance on cross-sectional studies. Over two thirds of articles described their sample as university students and the median percentage of females was 63.30%. Therefore, fewer cross-sectional studies using convenience samples and more population-based, longitudinal research is needed to understand the factors predicting loneliness over time, and the downstream impact of loneliness for emerging adults.