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Judgments of the appearance of colored papers blended with different proportions of white were obtained using a rotating color mixer. Responses consisted of a mark on a line labeled with the appropriate color name at one end and 'white' at the other. Prior context was avoided by obtaining only single judgments. It was found for all six color displays that distance from the colored end of the line was proportional to the square root of the proportion of white present in the mixture. This square root relation is in keeping with the physical correlate theory and with other experiments involving gray papers, point sources, and luminous fields. [ABSTRACT FROM AUTHOR]

Copyright of Zeitschrift für Lebensmittel-Untersuchung und -Forschung is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The influence of background reflectance was determined for lightness judgments relative to white of small gray patches. The effect of prior stimulus-context was avoided by considering only first judgments. It was found that lightness was proportional to the square root of reflectance when the background was a gray darker than the stimulus, but not when the background was lighter gray or white. In general, a small difference in reflectance between the stimulus and and background produced the same effect as a larger difference. [ABSTRACT FROM AUTHOR]

Copyright of Geologische Rundschau is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A curvilinear relationship between texture and perceived length was investigated in. two experiments. In Experiment 1 the perceived lengths of four grades of emery cloth and an untextured stimulus were compared in a forced-choice procedure. Generally, as predicted, fine-texture stimuli were perceived as longer than coarse-textured stimuli. Experiment 2 attempted to modify the biasing effect of texture by employing preliminary training with fine or coarse textures. Although unsuccessful in modifying the bias, the curvilinear relationship between texture and perceived length was agmn supported. Some implications for constructing teaching materials for the blind are discussed. [ABSTRACT FROM AUTHOR]