Beyond Snap Ratio
Methods paper · data descriptor · exploratory pilot
Reproducible Force–Travel Measurement and Exploratory Perceptual Correlates of Weight and Collapse Sharpness in Electrocapacitive Domes
Preprint DOI: 10.5281/zenodo.22167065
Compendium DOI: 10.5281/zenodo.22167047
Plain-language summary
What this paper adds.
A dome's nominal force does not describe the full shape of its force-travel curve. This paper defines a reproducible way to measure the collapse, descent, recovery, and detected force-wall onset, then connects the released objective evidence to one author's repeated ratings of perceived weight and collapse sharpness.
In this 25-dome pilot, collapse force had the strongest observed rank association with perceived weight, while force Drop had the strongest observed rank association with tactility sharpness. Those findings motivated two fleet-percentile presentation indices in Force Curve Bench fc-3.4.
Perceived weight
Collapse force led the tested metrics
Observed Spearman ρ = 0.951745 across the 25 three-session dome means. Weight Index therefore reports collapse-force position within the released 68-dome fleet.
Tactility sharpness
Force Drop led the tested metrics
Observed Spearman ρ = 0.930200 across the same panel. Tactility Index therefore reports force-Drop position within the same reference fleet.
Claim boundary: these are exploratory, single-rater, post-hoc, in-sample associations. They do not establish causation, population validity, inter-rater validity, independent metric contributions, or prediction for unseen users, assemblies, or domes.
How to read the indices
Percentiles, not predicted feelings.
Weight Index
Where a dome's collapse force ranks inside the frozen 68-dome reference fleet, from the lightest fleet endpoint to the heaviest.
Tactility Index
Where its measured force Drop ranks inside the same fleet, from the least-sharp fleet endpoint to the sharpest.
- An index of 80 is not twice an index of 40.
- The values are not universal human ratings or ratio scales.
- Detected force-wall onset remains separate from both indices.
- A future fleet revision may change percentile positions even when an underlying measurement does not change.
Citation and reuse
Link to the DOI record.
Use the version-specific DOI below when citing the exact August 29 release. Zenodo supplies the PDF, DOCX, Markdown source, figures, citation exports, checksums, rights records, and version history.
License boundary: the manuscript and original paper figures are licensed CC BY 4.0. That license does not automatically relicense Force Curve Bench, the generator, test-imp, raw or canonical evidence, third-party material, or every file in the compendium. The compendium's included rights manifest controls file-by-file CC BY 4.0, MIT, and not-relicensed scopes.