The Effect of the Virtual Reality–Based Biofeedback Intervention DEEP on Stress, Emotional Tension, and Anger in Forensic Psychiatric Inpatients: Mixed Methods Single-Case Experimental Design

Lisa Klein Haneveld   ^{1, 2} , MSc ;   Tessa Dekkers   ¹ , PhD ;   Yvonne H A Bouman   ² , PhD ;   Hanneke Scholten   ³ , PhD ;   Joanneke Weerdmeester   ⁴ , PhD ;   Saskia M Kelders   ¹ , PhD ;   Hanneke Kip   ^{1, 2} , PhD

¹ Centre for eHealth and Wellbeing Research, Department of Psychology, Health and Technology, University of Twente, Enschede, The Netherlands

² Department of Research, Transfore, Deventer, The Netherlands

³ Department of Child and Adolescent Psychiatry and Psychology, Erasmus Medical Centre, Rotterdam, The Netherlands

⁴ Research Group Creative Making Processes & Technology, HKU University of the Arts, Utrecht, The Netherlands