User-Centered Development of STOP (Successful Treatment for Paranoia): Material Development and Usability Testing for a Digital Therapeutic for Paranoia

Che-Wei Hsu   ^{1, 2} , PhD ;   Daniel Stahl   ³ , PhD ;   Elias Mouchlianitis   ⁴ , PhD ;   Emmanuelle Peters   ^{5, 6} , PhD ;   George Vamvakas   ³ , MSc ;   Jeroen Keppens   ⁷ , PhD ;   Miles Watson   ² , MSc ;   Nora Schmidt   ² , MSc ;   Pamela Jacobsen   ⁸ , PhD ;   Philip McGuire   ⁹ , MD ;   Sukhi Shergill   ² , MD ;   Thomas Kabir   ⁹ , PhD ;   Tia Hirani   ² , MSc ;   Ziyang Yang   ² , MSc ;   Jenny Yiend   ² , PhD

¹ Department of Psychological Medicine, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand

² Department of Psychosis Studies, King's College London, Institute of Psychiatry, Psychology & Neuroscience, London, United Kingdom

³ Department of Biostatistics and Health Informatics, King's College London, Institute of Psychiatry, Psychology & Neuroscience, London, United Kingdom

⁴ University of East London, London, United Kingdom

⁵ Department of Psychology, King's College London, Institute of Psychiatry, Psychology & Neuroscience, London, United Kingdom

⁶ South London and Maudsley National Health Service Foundation Trust, London, United Kingdom

⁷ Department of Informatics, King's College London, London, United Kingdom

⁸ University of Bath, Bath, United Kingdom

⁹ Department of Psychiatry, University of Oxford, Oxford, United Kingdom