XR-BASED PLATFORM FOR NEURO-COGNITIVE-MOTOR-AFFECTIVE ASSESSMENTS

Smart overview of the Invention

An innovative method has been developed for conducting neuropsychological assessments using an extended reality (XR) platform. This system projects virtual objects onto an immersive display, enabling three-dimensional interaction with the test subject. The assessment process includes cognitive tests aimed at evaluating executive functions while simultaneously monitoring various motor skills through a combination of advanced sensors. These sensors track movements such as hand and head motion, eye movement, gait, and postural stability, integrating the data to provide a comprehensive evaluation of the individual's neurocognitive and motor capabilities.

Significance of Ecological Validity in Assessments

Current neuropsychological tests often lack ecological validity, meaning they do not accurately reflect real-world cognitive functioning. Traditional methods, such as pencil-and-paper tests, fail to account for the complexities of everyday tasks that require interaction among cognitive, sensory, and motor functions. The XR platform addresses these limitations by creating immersive environments that simulate real-life scenarios, allowing for a more accurate assessment of executive functions and their relevance to daily living.

Implementation of Virtual Reality Systems

The XR assessment includes two distinct virtual reality systems: the DOME-CTT for large-scale environments and the HMD-CTT for portable head-mounted displays. Both systems utilize the Color Trails Test (CTT) to measure sustained and divided attention. Participants engage with the virtual environment by completing tasks that involve connecting numbered targets while their performance metrics are recorded. This method enhances the ability to assess cognitive constructs in a manner that traditional tests cannot achieve.

Research Findings on Construct Validity and Reliability

Research conducted with healthy adults across different age groups demonstrated that the VR-based assessments show moderate correlations with established pencil-and-paper tests, indicating strong construct validity. The VR versions also exhibited high test-retest reliability and discriminant validity, effectively differentiating between performance levels in younger, middle-aged, and older participants. Notably, VR completion times were longer than those for traditional tests, particularly among older adults, highlighting differences in cognitive processing demands.

Future Directions and Applications

This XR-based platform not only enhances cognitive assessments but also integrates motor and affective measurements, providing a holistic view of an individual's capabilities. By incorporating real-time data from various sensors, this method allows for a deeper understanding of how cognitive processes interact with motor functions during task performance. Future applications may include personalized assessments and interventions tailored to individual needs, paving the way for advancements in neuropsychological testing and rehabilitation strategies.