Further report on the testing of efficiency of night vision: Comparative reliability and validity measures on the adactometer and the self-luminous tele-silhouette adaptometer.

Abstract

An extensive experimental test was conducted on the following adaptometers: Beals Adactometer; Selfluminous tele-silhouette, as revised at the U. S. Submarine Base, New London, Conn.; Hecht-Shlaer portable Adaptometer, Royal Canadian Navy Model. The data obtained permit comparison of the three instruments with respect to test-retest reliability. Intercorrelations are presented, together with correlations with several other possibly significant variables. There are now available several adaptometric procedures and instruments which yield scores of satisfactory reliability. None of these, however, were validated. The most pressing need at the present time is for the setting-up of procedures which may settle the question of the validity of the various instruments and methods which satisfy the requirements with respect to reliability. I. Q. and 'emotional stability', as they are usually determined, are of no consequence in the testing of the night vision of normal populations. (Author)