Thank you for that answer. I am actually interested on the impact of Laughter on the carers not the patients. However if you have any other link regarding laughter therapy. I will be glad to have it.
Our team conducted research using humour therapy and looked at the impact on both people with dementia in residential aged care and their formal caregivers, if that would be of interest?
Apologies for my delay in responding. I have uploaded the full text versions of the articles from our study. You should be able to access them from my profile page. If you have any difficulty viewing them, please let me know and I will send the PDFs to you directly. The Chenoweth et al 2014 article may be the most relevant to your question and then perhaps the Low 2014 article. Dr. Pia Kontos (ResearchGate) has also done work in this area.
If I may suggest, The Arts Health Institute website may be of interest: https://www.artshealthinstitute.org.au/ . I'm certain that their CEO Dr. Maggie Haertsch would be happy to communicate with you regarding their programs and experience.