ASTM E1808-26

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Other standards related to optics and optical measurements

Annotation of standard text ASTM E1808-26 :

This guide is intended to help the user decide on the type of viewing conditions, visual scaling methods, and analysis that should be used to obtain reliable visual experimental data. It is also intended to illustrate the techniques that lead to visual observations that can be correlated with objective instrumental measurements of appearance attributes of objects. This guide includes a review of issues regarding the choice and design of viewing environments, an overview of various classes of visual experiments, a review of experimental techniques for threshold, matching, and scaling experiments, a review for data reduction and analysis procedures. The three different threshold and matching techniques namely, the methods of adjustment, limits, and constant stimuli, are explained. Perceptual scaling techniques reviewed include ranking, graphical rating, category scaling, paired comparisons, triadic combinations, partitioning, and magnitude estimation or production. Brief descriptions and examples, along with references to more detailed literature, are given on the appropriate types of data analysis for each experimental technique.

Keywords:

category scaling, interval scales, magnitude estimation, matching experiments, nominal scales, ordinal scales, paired comparisons, rank ordering, ratio scales, threshold determination, visual experiments, visual scaling,, ICS Number Code 17.180.99 (Other standards related to optics and optical measurements)