Quantitative indices of group interaction were developed using a sociometric questionnaire for interpersonal work and social contacts, administered to 1853 Air Force personnel, comprising 123 work groups at 16 remote AC&W sites in Alaska. Nineteen sociometric indices, corrected statistically for group size were intercorrelated and analyzed by factor analysis and cluster analysis, yielding eight factors, six of which conform to the six clusters independently identified. The remaining two factors were each specific to a single variable. The factors were provisionally identified as follows: I. Interaction Extent, ll. Conformity to Command Structure, III. Cohesiveness of Work Groups, IV. Formal Cooperation I, VI. Interactions Outside Work Group, and VII. Formal Cooperation II. Factors V and VIII, identified by single variables, were not interpreted. These dimensions of group interaction may be useful in comparing groups differentiated on the basis of membership, organization, structure, environmental context, or performance criteria.