Samenvatting
The development of each new mental measurement device brings with it the necessity for a variety of studies which supply information adequate to describe relevant performance characteristics of the new device. The Purdue Non-Language Adaptability Test (here in after referred to as the PNLAT) is one such new device and may be classified as a non-language group test of mental ability, intended for business and industrial use. Previous reports (1,2,3) have supplied PNLAT norms, reliability and validity estimates and information concerning various other characteristics of this test. The writer feels that the present study makes some additional contributions and may be of interest to those contemplating use of the PNLAT.