About the Authors

Katie Biggs

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Writing – original draft, Writing – review & editing

c.e.biggs@sheffield.ac.uk

Affiliation Clinical Trials Research Unit, Division of Population Health, University of Sheffield, Sheffield, United Kingdom

Gina Gomez de la Cuesta

Roles Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Supervision, Writing – review & editing

Affiliations Play Included C.I.C, Cambridge, United Kingdom, University of Cambridge, Cambridge, United Kingdom

Ellen Kingsley

Roles Data curation, Formal analysis, Investigation, Methodology, Project administration, Writing – original draft, Writing – review & editing

Affiliation Child Oriented Mental Health Innovation Collaborative, Leeds and York Partnership NHS Foundation Trust, York, United Kingdom

Jean McPherson

Roles Formal analysis, Writing – review & editing

Affiliation Play Included C.I.C, Cambridge, United Kingdom

Fergus Murray

Roles Formal analysis, Writing – review & editing

Affiliation Autistic Mutual Aid Society Edinburgh, Edinburgh, United Kingdom

Margaret Laurie

Roles Formal analysis, Writing – review & editing

Affiliations Play Included C.I.C, Cambridge, United Kingdom, University of Cambridge, Cambridge, United Kingdom

Matt Bursnall

Roles Data curation, Formal analysis, Investigation, Project administration, Writing – review & editing

Affiliation Clinical Trials Research Unit, Division of Population Health, University of Sheffield, Sheffield, United Kingdom

Elizabeth Coates

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Supervision, Writing – review & editing

Affiliation Clinical Trials Research Unit, Division of Population Health, University of Sheffield, Sheffield, United Kingdom

Amy Barr

Roles Data curation, Formal analysis, Investigation, Project administration, Writing – review & editing

Affiliation Clinical Trials Research Unit, Division of Population Health, University of Sheffield, Sheffield, United Kingdom

Competing Interests

JM, ML, GGC are employed by Play Included CIC, a not-for profit community interest company. Play Included have funding from the LEGO Foundation. The LEGO® Foundation is a Danish philanthropic organisation who fund charities and not-for-profit organisations to support learning through play. As such, Play Included has links to the LEGO® foundation but not the LEGO® Group (which is a commercial company that sells LEGO bricks). The LEGO group does not have any influence over Play Included. The LEGO Foundation was not involved in any part of the I-SOCIALISE trial or this paper. No commercial LEGO® entities, including the LEGO® group were involved in any part of the I-SOCIALISE trial, except granting special permission for the term LEGO® based therapy Play Brick Therapy to be used in research communications about the I-SOCIALISE trial (now known as Play Brick Therapy).