German Version of the Telehealth Usability Questionnaire and Derived Short Questionnaires for Usability and Perceived Usefulness in Health Care Assessment in Telehealth and Digital Therapeutics: Instrument Validation Study

Jannik Zimmermann   ^{1 *} , MSc ;   Harriet Morf   ^{2, 3 *} , MBA, MD ;   Florian Scharf   ⁴ , Prof Dr ;   Johannes Knitza   ^{5, 6} , MHBA, PD Dr ;   Heidi Moeller   ¹ , Prof Dr ;   Felix Muehlensiepen   ^{6, 7} , MPH, Dr rer medic ;   Michaela Nathrath   ⁸ , Prof Dr ;   Till Orlemann   ⁹ , MD ;   Thomas Voelker   ⁸ , MD ;   Merlin Deckers   ⁸ , MD

¹ Department of Psychology – Theory and Methodology of Counseling, University of Kassel, Kassel, Germany

² Department of Internal Medicine 3, Rheumatology and Immunology, University Hospital Erlangen, Friedrich-Alexander University (FAU), Erlangen-Nuremberg, Erlangen, Germany

³ Deutsches Zentrum Immuntherapie (DZI), University Hospital Erlangen, Friedrich-Alexander University (FAU), Erlangen-Nuremberg, Erlangen, Germany

⁴ Department of Psychology – Psychological Research Methods, University of Kassel, Kassel, Germany

⁵ Institute for Digital Medicine, University Hospital of Giessen and Marburg, Philipps University Marburg, Marburg, Germany

⁶ AGEIS, Université Grenoble Alpes, Grenoble, France

⁷ Center for Health Services Research, Faculty of Health Sciences, Brandenburg Medical School Theodor Fontane, Ruedersdorf bei Berlin, Germany

⁸ Palliative Care Team for Children Kassel, Kassel, Germany

⁹ Department of Internal Medicine 1, University Hospital Erlangen, Friedrich-Alexander University (FAU), Erlangen-Nuremberg, Erlangen, Germany

*these authors contributed equally