Touchscreen Motion Restriction Regions for Valid Biomechanical Data
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Solution Overview
Problem
Traditional neuropsychological tests require skilled clinicians, are costly, and suffer from invalid results due to users employing compensatory strategies during self-administered computer-mediated tests, leading to unreliable biomechanical data.
Innovation Solution
A touchscreen-based system with motion restriction regions to isolate specific biomechanical motions, preventing spurious inputs and ensuring valid touch inputs by anchoring digits, thereby correlating data with specific cortical areas and reducing compensatory strategies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If self-administered computer-mediated tests are used, then accessibility and cost are improved, but reliability of biomechanical data deteriorates due to compensatory strategies
Solution Approach 1:
The system applies preliminary anti-action by implementing motion restriction regions that prevent compensatory movements before they can invalidate the test results. The user interface is configured with designated regions that constrain the user's hand and finger movements, ensuring that only the intended digit can interact with testing elements while other body parts are biomechanically restricted from providing spurious inputs.
Solution Approach 2:
The system applies local quality by creating specific motion restriction zones on the touchscreen interface. Each testing element is associated with a localized region where only specific digits are permitted to make contact. This spatial differentiation ensures that cognitive and motor skills are assessed with high precision by isolating the biomechanical contribution of individual digits while maintaining the accessibility of self-administered testing.
2Measurement precision
If motion restriction regions are implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The system applies universality by implementing a standardized user interface framework where motion restriction regions are integrated into the existing touchscreen interface. The same display and input hardware serves dual purposes: presenting test content and enforcing biomechanical constraints. This multi-functionality allows the system to achieve high measurement precision without adding separate physical constraint devices, thereby managing complexity while improving measurement accuracy.
Data Source
AI summary
A client device is configured with a test administration application for conducting self-administered tests. A user interface of the test administration application includes motion restriction regions configured to prevent select types of body motion during particular segments of self-administered tests, and testing regions configured to receive a touch input performed by a specific digit of the user. For example, a touch input involves touching, holding, or tapping a single digit within the bounds of a testing region in accordance with instructions provided by the test administration application. The test administration module records motion data comprising one or more touch events, each touch event describing a touch input performed by the user. Undesired touch inputs that may obscure or degrade the reliability of biomechanical data are identified. The test administration module determines whether a user has successfully completed the test in accordance with instructions provided by the test administration application.