The study was designed to identify and define the factors which contribute to undergraduate navigator training (UNT) attrition and to present recommendations to reduce the effects of those factors. Longitudinal data were collected from six UNT classes and augmented with cross-sectional data from a sample of 15 UNT classes. The student data are composed of the results of interviews, a test battery, and record information. In addition, a sample of instructors was interviewed and tested. Data analysis provided evidence to support recommendations in the areas of selection, course modification, and Air Force policy. The document concludes with six appendixes: attitude scales, anxiety-state scale (short form), interview formats, instructor rating forms, phase difficulty rating forms, and summaries of various statistics. (BP)