The Active Brains Digital Intervention to Reduce Cognitive Decline in Older Adults: Protocol for a Feasibility Randomized Controlled Trial

Kirsten Ailsa Smith   ^{1 *} , MA, MSc, PhD ;   Katherine Bradbury   ^{1 *} , PhD ;   Rosie Essery   ¹ , PhD ;   Sebastien Pollet   ¹ , PhD ;   Fiona Mowbray   ¹ , PhD ;   Joanna Slodkowska-Barabasz   ¹ , PhD ;   James Denison-Day   ¹ , PhD ;   Victoria Hayter   ¹ , PGDip ;   Jo Kelly   ² , BSc ;   Jane Somerville   ² ;   Jin Zhang   ¹ , PhD ;   Elisabeth Grey   ³ , PhD ;   Max Western   ³ , PhD ;   Anne E Ferrey   ^{4, 5} , PhD ;   Adele Krusche   ¹ , PhD ;   Beth Stuart   ² , PhD ;   Nanette Mutrie   ⁶ , PhD ;   Sian Robinson   ⁷ , PhD ;   Guiqing Lily Yao   ² , PhD ;   Gareth Griffiths   ⁸ , PhD ;   Louise Robinson   ⁹ , PhD ;   Martin Rossor   ¹⁰ , MD ;   John Gallacher   ¹¹ ;   Simon Griffin   ¹² , MD ;   Tony Kendrick   ² , MD ;   Shanaya Rathod   ¹³ , MBBS ;   Bernard Gudgin   ¹⁴ , PhD ;   Rosemary Phillips   ¹⁴ ;   Tom Stokes   ¹⁴ ;   John Niven   ¹⁴ ;   Paul Little   ² , MD ;   Lucy Yardley   ^{1, 15} , PhD

¹ Centre for Community and Clinical Applications of Health Psychology, University of Southampton, Southampton, United Kingdom

² Primary Care and Population Sciences, University of Southmapton, Southampton, United Kingdom

³ Department for Health, University of Bath, Bath, United Kingdom

⁴ Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

⁵ NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom

⁶ Physical Activity for Health Research Centre, University of Edinburgh, Edinburgh, United Kingdom

⁷ NIHR Newcastle Biomedical Research Centre, Newcastle University and Newcastle upon Tyne NHS Foundation Trust, Newcastle upon Tyne, United Kingdom

⁸ Southampton Clinical Trials Unit, University of Southampton and University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom

⁹ Institute of Population Health Sciences, University of Newcastle, Newcastle upon Tyne, United Kingdom

¹⁰ Dementia Research Centre, University College London, London, United Kingdom

¹¹ Department of Psychiatry, University of Oxford, Oxford, United Kingdom

¹² Department of Public Health and Primary Care, University of Cambridge, Cambridge, United Kingdom

¹³ Southern Health NHS Foundation Trust, Southampton, United Kingdom

¹⁴ Public and Patient Involvement (PPI) representative, University of Southampton, Southampton, United Kingdom

¹⁵ School of Psychological Science, University of Bristol, Bristol, United Kingdom

*these authors contributed equally