Laughter and humour for personal development: A systematic scoping review of the evidence

Introduction: The accessibility of laughter and humour make them attractive choices for self-care, and integrative medicine. There is a growing body of literature, but both fields are fragmented and the overall evidence has not been systematically reviewed. The relationship between health and personal development is increasingly recognized. This review scopes the evidence for laughter and humour interventions from the perspective of their potential benefits on personal development. Methods: A systematic scoping review used Joanna Briggs guidelines and the Preferred Reporting Items for Systematic Reviews Scoping Review extension (PRISMA-ScR). All-population laughter and humour interventions described in primary and secondary research from 1970, and in English, were searched in Web of Science and PubMed/Medline. Results: Analysis of 240 primary research articles (k), and 11 systematic reviews (K), identified k = 564 discrete articles with studies involving 574,611 participants (n). Twelve large studies (n > 15,000) contributed 77 % of participants. Classification analysis found more research relating to humour (k = 445, n = 334,996) than laughter (k = 119, n = 239,615) and identified diverse personal development outcomes associated with Biological, Psychological, Social, Environmental, and Behavioural (BPSE-B) factors. Conclusion: This review presents growing evidence for the diverse applications and benefits of laughter and humour. Multiple opportunities for self-care and interventional applications are described. The consideration of personal development outcomes may support tailored applications according to specific needs and objectives. An umbrella Personal Development Theory of laughter and humour, inclusive humour and laughter definitions, and a humour-laughter-affect model are proposed to unify the fields.