This study aims to evaluate the effectiveness of a group-based Positive Affect (PA) intervention compared to an active control condition, Social Skills Training (SST), in reducing loneliness among young adults in Hong Kong and mainland China. It further examines the psychological mechanisms underlying intervention effects, specifically the roles of positive affect and perceived social support as mediators, and rejection sensitivity as a moderator influencing both treatment responsiveness and outcome translation.
aged 18 to 30 years
proficiency in Chinese (Cantonese or Mandarin)
experiencing loneliness (defined as a score of ≥ 6 on the 3-item UCLA Loneliness Scale)
cognitive impairments
psychiatric disorders, learning disabilities, or active suicidal ideation
currently participating in other psychotherapy or psychosocial interventions aimed at enhancing well-being