This document is a guide for use by the practical researcher concerned with conducting studies of transfer of learning from pretraining of pilots in ground-based environments to performance in aircraft. While the material addresses principally transfer of learning of pilots, many of the issues should be applicable to other contexts, to include training of other aircrew members or even individuals who have quite different tasks to perform. The paper does not deal with theory but, rather, is concerned entirely with method of the transfer study. Method issues, including the planning, task, students, performance measurement, instructors, and analyses, are central to arriving at precise estimates of transfer effects--approaching as closely as possible the maximum that might have been demonstrated, providing a goal for the operational instructor pilot. Study models discussed include those for percent transfer of learning and for the transfer effectiveness ratio. Use of the latter should be essential in providing answers to contemporary questions concerning how much simulator pretraining can be used to replace aircraft training time--without reducing the production of the combat effective pilot. The guide was developed through review of published and unpublished studies of transfer of training from ground-based simulator to actual plane flying done during the past twenty or more years. Eleven steps were identified and are sequenced in the guide for use by researchers. (Author/KC)