Using a test retest design, this study investigated effects of Marine oriented Field Medical Service School training on the attitudes of 337 Navy corpsmen. Six issues pertaining to corpsmen and their work were created and administered as a survey instrument based on the Sherif Method of Ordered Alternatives. Attitude and ego involvement changes were analyzed by the Wilcoxon Matched-Pairs Signed Ranks Test, while data from initial survey responses were analyzed by the large sample Binomial Test. Comparisons among training groups, company groups, and prior duty station groups were also made. Results indicated no test retest effect. Three issues showed significantly negative attitude changes. Results on other issues were accounted for in terms of shifted objects of reference. Ego involvement tended to decrease, but levels of significance varied greatly among issues. Principal conclusions were: the survey instrument showed merit for its purpose; attitude and ego involvement changes reflected the behavioral training situation; cynical indifference and verbal denigration were two attitudinal reactions to training; further specification of conditions is needed for attitude prediction with similar training groups. (Author/LY)