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247. Subjective Scaling of Digital Imagery

Author

Shedivy, David I. and Snyder, Harry L.

Abstract

Hard-copy digital imagery was studied with respect to subjective image quality. Trained Air Force photo-interpreters judged the interpretability of 250 military images. The images varied in noise, blur, and scene content.Other analyses performed on the data showed that at least 62 categories should be used to scale interpretability, the correlation between information extraction performance and scale values for digital imagery is high, and multidimensional scaling can be used with questionable utility in studying image quality.

Published
1981
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249. Verbal Protocols as a Research Tool in Human Factors: Panel Discussion

Author

Deffner, Gerhard, Snyder, Harry L., Bittner, Alvah C., Rhenius, Detlef, and Sanderson, Penelope M.

Abstract

Verbal protocols have been used for many years in different research contexts, but there still is no clear consensus about the validity of the technique and methods for maximizing validity in an applied setting; how to standardize the collection and analysis of protocols; and last but certainly not least, whether the resulting data is worth the effort.This panel discussion is a companion to a symposium at this conference which presents empirical studies and human factors applications of verbal protocol techniques. The panel will focus in more depth on issues raised in that earlier session, with the goal of providing guidance for practical applications of the technique.

Published
1990
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250. 'U.S. action in Grenada.' (letter)

Author

De Vita, Vincent, Spotts, Vicki Ono, Snyder, Harry Y., Stavrianos, L.S., Amador, Betty, Amador, Jose, Webster, Y.O., Wynn, Ned, Lang, Catherine B., and Mitchell, Ed

Subjects
Freedom of the press -- Public opinion, Intervention (International law) -- Public opinion, Press and politics -- Analysis
Published
1983

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