Accession Number : AD0823438

Title :   AN APPROACH TO MEASURING CAMOUFLAGE EFFECTIVENESS,

Corporate Author : ARMY MOBILITY EQUIPMENT RESEARCH AND DEVELOPMENT COMMAND FORT BELVOIR VA

Personal Author(s) : Johnson, Ronald Leon

Report Date : SEP 1967

Pagination or Media Count : 32

Abstract : This report contains a study of sample sizes (N) necessary to measure the effectiveness of camouflage techniques. Probability is useful in measuring the dependent variable percentage of targets located, and analysis of variance with individual comparisons should be used with the variables of distance from ground zero where a target is located and time of search. In the past, many investigators in the field of camouflage evaluation have used larger sample sizes than necessary in their studies. When proportions are employed, the same degree of predictability can be achieved if the investigator keeps the sample sizes equal, does not exceed an N of 30 for the middle proportional ranges of effectiveness of camouflage, and remains under 40 to 45 for the extreme examples with the proportions of 0.1 to 0.2 and 0.8 to 0.9. If the investigator's assumptions of normality and homogeneity of variance are violated, the techniques of analysis of variance will not significantly be affected with equal smaple size and an N of 15 or more. The methods of sampling are briefly discussed. With smaller sampling sizes more studies can be performed at less expense. (Author)

Descriptors :   (*CAMOUFLAGE, EFFECTIVENESS), MEASUREMENT, STATISTICAL ANALYSIS, SAMPLING, CONFIDENCE LIMITS, ANALYSIS OF VARIANCE, TARGETS, POSITION FINDING, PROBABILITY.

Subject Categories : Military Operations, Strategy and Tactics

Distribution Statement : APPROVED FOR PUBLIC RELEASE