Feasibility and Concurrent Validity of Pediatric Performance-Based Postural Control Subtests Using a Pressure-Sensitive Exergaming Device: A Cross-Sectional Study

Postural control deficits are common among children with and without disabilities. Performance-based postural control tests provide both quantitative and qualitative insights into the severity of these deficits but are underutilized in clinical practice. Digitizing existing postural control tests could increase their overall implementation. # Purpose This study examined the feasibility and validity of 'Matti', a pressure-sensitive device, as a tool for recording simple continuous data for two performance-based postural control subtests: the time in seconds during the One-Board Balance Test (OBBT) and the number of jumps during the Lateral Jump Test (LJT), in typically developing children. # Study Design Cross-sectional study # Methods Both conventional and digitized versions of both the OBBT and LJT were administered. The conventional test condition was rated by an observer, while the digitized version was scored by both an observer and analysis software using Matti's sensor data. Correlation analyses, comparisons of the mean or median, and Bland-Altman plots were used to assess concurrent validity and level of agreement between conventional and digitized test conditions, as well as between observed and digital outcomes of the digitized test condition. The level of enjoyment between conventional and digital testing was evaluated using a Smiley-o-Meter. # Results Forty-six children (average age 8.98 (±1.04) years, 10 female) participated in this study. Digitized testing showed strong correlations between digital and observer-based outcomes for both the digital OBBT (rs=.991, p<0.001) and LJT (r=.962, p<0.001). However, differences were noted between conventional and digitized conditions. Participants reported significantly higher levels of enjoyment during digital testing (Z=-2.530; p = 0.011). # Conclusion The Matti demonstrates good feasibility for a simple digitized performance-based postural control test. However, differences between the scores of conventional and digitized test conditions indicate a lack of concurrent validity with conventional clinical tests. The higher perceived enjoyment reported during digital testing suggests its potential as a valuable tool in pediatric postural control assessment and rehabilitation.