In a study of 2 occupational groups at small scientific stations in Antarctica, the motivations of 129 Navy enlished men who volunteer were less related to their specific jobs in the Antarctic than those of 66 civilian scientists. Results confirm the hypothesis that occupational group is a moderator of the job satisfaction-job performance relationship, and that the relationship is more pronounced for the scientist group than for the Navy enlisted group. (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.