Comparative Study of Augmented Reality and Virtual Reality in Music Therapy Interventions for Individuals With Cerebral Palsy

The goal of this clinical trial is to compare the user experience of Augmented Reality (AR) and Virtual Reality (VR) applications during music therapy interventions in individuals with Cerebral Palsy aged 15 to 35 years with Gross Motor Function Classification System (GMFCS) level I-V. The main questions it aims to answer are: Does AR or VR result in lower levels of cybersickness as measured by the Simulator Sickness Questionnaire (SSQ)? Does AR or VR provide better usability, preference, and perceived ease of interaction? Researchers will compare AR and VR conditions to determine which technology results in lower cybersickness levels, higher usability scores, and greater user preference. Participants will: complete a pre-intervention SSQ assessment; engage in AR and VR sessions in a counterbalanced order using the Meta Quest 3 headset; explore each virtual environment for 5 minutes; perform motor tasks involving reaching and interacting with virtual musical objects (musical cubes representing musical notes: C-D-E-F-G-A-B); perform cognitive tasks involving identification and reproduction of musical note sequences guided by a therapist; perform percussion activities by following rhythmic patterns played by a therapist using virtual instruments; complete post-condition assessments after each session, including SSQ, System Usability Scale (SUS), preference, and reported difficulties.