| Autor: |
John C. Ogilvie, Chester L Olson |
| Rok vydání: |
1972 |
| Předmět: |
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| Zdroj: |
Journal of Mathematical Psychology. 9:320-338 |
| ISSN: |
0022-2496 |
| DOI: |
10.1016/0022-2496(72)90022-3 |
| Popis: |
Although Thurstone's basic model of comparative judgment has been generalized by several authors to accommodate more than two categories of response in psychometric scaling, none has provided the psychophysical link from the subjective scale to the physical magnitudes of the stimuli. Such a model, based on the assumption of a linear relationship, is presented for the analysis of data from the method of constant stimuli with ratings of certainty. It yielded an excellent fit to empirical data collected in a variety of psychophysical tasks where the number of observations was typical of threshold studies. A simulation revealed that while the use of more than two categories results in greater precision in the estimation of the subject's sensitivity, the gain in information for each category added beyond four categories is very small. More reliable estimates of sensitivity were obtained from actual data when subjects were allowed four categories rather than two. The relationship of the model's sensitivity parameter to the difference threshold of psychophysics is demonstrated. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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