Interactive Model · Documentation
How the model is computed
Phase 1 didactic transmission layer. This page explains what the interactive model does—and what it must not be mistaken for.
Current status
- Research architecture established — research question, layered method (measurement → representation → transmission → physiological test), zone taxonomy, falsification criteria (F1–F3), and collaboration governance.
- Measurement protocols under development — zone-specific mechanical acquisition, calibration/QC, and test–retest plans are being defined; they are not yet locked as validated standard operating procedures.
- Computational transmission layer currently illustrative — interactive model and Phase 1 intake parameters (including restriction-like / didactic controls and observational MPA-style scores) explore predicted transmission quantities. They are not empirical tissue measurements.
- Empirical validation pending — reliability of candidate mechanical measures, coherence of any latent “restriction” construct, and preregistered prediction of independent physiological outcomes have not yet been demonstrated.
Place in the research hierarchy
- Measurement layer — observed mechanical quantities (zone-specific instruments/protocols).
- Mechanical representation layer — derived parameters (\(G'\), \(G''\), strain, hysteresis, relaxation, displacement, force–displacement, etc.).
- Computational transmission layer — this model: predicted transmission quantities.
- Physiological test layer — independent outcomes under preregistered analyses.
Full program language: Research Framework.
What the interactive model does
Given a stated mechanical representation (for example stiffness- and viscosity-like terms in a Kelvin–Voigt-style element), the model computes predicted quantities such as:
- transmitted amplitude / fidelity-like proxies
- effective precision proxies (πeff-style terms)
- prediction-error terms
- free-energy-style costs and illustrative gradients with respect to didactic controls
Exact equations and defaults are versioned with the calculation engine (model_version on stored runs).
What “restriction” means in the UI
Any restriction-like control is a didactic latent variable used to explore model sensitivity. In empirical work, latent mechanical state must be approached through the measurement and representation layers. Sliding a control is not data acquisition.
MPA-style overlays, if shown, are observational—not validated mechanical gold standards and not primary determinants of computational parameters until preregistered validity criteria are met.
Limitations
- Low-dimensional; not full soft-tissue, fluid, or neural circuit physics.
- Parameters and constitutive assumptions are provisional.
- Zone anatomy differs; one illustrative control law does not imply one physical instrument for all eight interfaces.
- Not for diagnosis, triage, or treatment decisions.
- Empirical support for a latent “restriction” construct is to be tested, not presupposed by the interface.
Falsification (scientific vs software)
Scientific falsification of the restriction construct is defined in the Research Framework (reliability failure, construct failure, predictive failure). Internal UI sensitivity (e.g. how predicted metrics move when an illustrative control changes) is software quality assurance only.