This study evaluates the effectiveness of a pilot judgement training programme, based upon methods and materials developed by the Embry-Riddle Aeronautical University. The study involved; modifying the training programme to apply to the New Zealand General Aviation environment; modifying the student training material to be self-explanatory; assessing how training affected the subjects knowledge, skills, and attitudes; and examining the relationship between personality and hazardous thought patterns. Using 56 student pilots enrolled at the Massey University School of Aviation, a small scale experiment was conducted using pre- and post-test measures. Subjects were divided into two groups, one received pilot judgement training (the experimental group), the other did not (the control group). The results showed training improved pilot judgement in a number of areas, and altered the subjects cognitive thought processes. Trainees supported the training method of instruction, and reported the training topics were relevant to judgement. No relationship was found between the hazardous thought patterns, and the subjects personality. Suggestions are made for future training, and research.