J. Anim Sci.
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J. Anim Sci. 1951. 10:378-385.
© 1951 American Society of Animal Science
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A Study of Classification Scores of Hereford Cows1

Warren Gifford, C. J. Brown and M. L. Ray

University of Arkansas2

Abstract

Subjective conformation scores of individual Hereford cows as given by four judges were analyzed to determine the agreement between judges, the repeatability of a judge on the same cow at different scoring dates, and to study the variation in scores of seven items of conformation.

Within-season correlations indicate that judges were in general agreement. on the points of conformation scored. Judges seemed to agree more closely for items on which they must consider the entire animal. Judges were best able to recognize differences in overall-rating and least able to recognize differences in fore quarters.

The correlations between repeated scores of a cow by the same judge were generally between 0.4 and 0.5 using this method of classification.

Judges were able to agree more closely with one another on a particular classification date than they were able to agree with their previous scores.

Although significant differences in judges scores existed, they were of minor importance in determining the total variance in conformation scores.

Footnotes

1 Research paper 1010 Journal Series, University of Arkansas. Published with the permission of the director of the Arkansas Agricultural Experiment Station.

2 The Animal Industry Department, University of Arkansas, acknowledgment is gratefully made for the assistance of N. W. Hilston and A. L. Neumann formerly staff members in Animal Industry.

3 Since 1948 the study has been in cooperation with the Southern Agricultural Experiment Stations, Regional Project S-10, and with the Bureau of Animal Industry, U.S.D.A,






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Copyright © 1951 by the American Society of Animal Science.