Momentary Manifestations of Negative Symptoms as Predictors of Clinical Outcomes in People at High Risk for Psychosis: Experience Sampling Study

Isabell Paetzold   ¹ , MSc ;   Karlijn S F M Hermans   ² , PhD ;   Anita Schick   ¹ , PhD ;   Barnaby Nelson   ^{3, 4} , PhD ;   Eva Velthorst   ⁵ , PhD ;   Frederike Schirmbeck   ^{6, 7} , PhD ;   EU-GEI High Risk Study   ⁸ ;   Jim van Os   ^{9, 10, 11} , PhD, MD ;   Craig Morgan   ^{12, 13} , PhD ;   Mark van der Gaag   ^{14, 15} , PhD ;   Lieuwe de Haan   ¹⁶ , PhD ;   Lucia Valmaggia   ¹⁷ , PhD ;   Philip McGuire   ^{10, 18} , PhD ;   Matthew Kempton   ¹⁰ , PhD ;   Inez Myin-Germeys   ² , PhD ;   Ulrich Reininghaus   ^{1, 12, 13} , PhD

¹ Department of Public Mental Health, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany

² Department of Neuroscience, Center for Contextual Psychiatry, KU Leuven, Leuven, Belgium

³ Orygen, Parkville, Victoria, Australia

⁴ Centre for Youth Mental Health, The University of Melbourne, Parkville, Victoria, Australia

⁵ Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY, United States

⁶ Department of Psychiatry, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, Netherlands

⁷ Arkin, Institute for Mental Health, Amsterdam, Netherlands

⁸ See Acknowledgments, Maastricht, Netherlands

⁹ Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, Netherlands

¹⁰ Department of Psychosis Studies, Institute of Psychiatry, King’s College London, London, United Kingdom

¹¹ Department of Psychiatry, Brain Center Rudolf Magnus, Utrecht University Medical Centre, Utrecht, Netherlands

¹² ESRC Centre for Society and Mental Health, King's College London, London, United Kingdom

¹³ Department of Health Service and Population Research, Centre for Epidemiology and Public Health, Institute of Psychiatry, Psychology & Neuroscience, School of Mental Health & Psychological Sciences, King's College London, London, United Kingdom

¹⁴ Department of Clinical, Neuro and Developmental Psychology, Vrije Universiteit, Amsterdam, Netherlands

¹⁵ Department of Psychosis Research, Parnassia Psychiatric Institute, The Hague, Netherlands

¹⁶ Department of Early Psychosis, Amsterdam UMC, Location AMC, University of Amsterdam, Amsterdam, Netherlands

¹⁷ Department of Psychology, Institute of Psychiatry, Psychology and Neuroscience, King's College London, London, United Kingdom

¹⁸ NIHR Biomedical Research Centre, South London and Maudsley NHS Foundation Trust, London, London, United Kingdom