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D’Andrea, Federica ORCID: https://orcid.org/0000-0002-1643-6162, Laureen Bartels, Sara ORCID: https://orcid.org/0000-0002-2626-2557, Markaryan, Marine, Masterson-Algar, Patricia ORCID: https://orcid.org/0000-0001-6344-1346, Nakakawa Bernal, Andrea, De Bruin, Simone R., Chirico, Ilaria, Flynn, Aisling, Garcia, Lesley, Gebhard, Doris, Handley, Melanie ORCID: https://orcid.org/0000-0002-8037-5042, Janssen, Niels, Roes, Martina ORCID: https://orcid.org/0000-0003-4531-8584, Stephens, Nathan, Teesing, Gwen, Van den Block, Lieve, Windle, Karen, Moniz-Cook, Esme ORCID: https://orcid.org/0000-0002-7232-4632 and Graff, Maud ORCID: https://orcid.org/0000-0003-4361-4291 (2026) Methodologies and methods for the development, evaluation and implementation of psychosocial interventions for dementia: protocol for a scoping review. BMJ Open, 16 (4). ISSN 2044-6055