Subjective Hardness of Compliant Materials
| Autor: | Roland Harper, S. S. Stevens |
|---|---|
| Rok vydání: | 1964 |
| Předmět: |
Materials science
Dynamometer 05 social sciences General Medicine White noise Power law 050105 experimental psychology Loudness 03 medical and health sciences 0302 clinical medicine Meyer hardness test Natural rubber Indentation visual_art Vickers hardness test visual_art.visual_art_medium 0501 psychology and cognitive sciences Composite material 030217 neurology & neurosurgery |
| Zdroj: | Quarterly Journal of Experimental Psychology. 16:204-215 |
| ISSN: | 0033-555X |
| DOI: | 10.1080/17470216408416370 |
| Popis: | The apparent hardness and softness of nine samples of compliant materials were scaled by direct magnitude estimation and by cross-modal matches to the apparent force exerted on a hand dynamometer and a finger dynamometer, and to the loudness of a band of white noise. The physical hardness (force/indentation) of the compliant specimens covered a range of more than 100 to 1, extending from a fairly soft sponge to a fairly hard block of rubber. The apparent hardness of the specimens was found to follow the psychophysical power law. Subjective hardness grows as the physical hardness raised to a power. The indicated exponent was about 0.8 for magnitude estimation, about 0.7 derived by calculation from handgrip matches, and about 0.6 derived by calculation from loudness matches. Numerical estimates and cross-modal matches for softness gave functions that were approximately the reciprocal of the functions given for hardness. Hardness is a continuum on which there exists an upper threshold. |
| Databáze: | OpenAIRE |
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