Reliability generalization studies were conducted on the motivation and learning strategies scales of the Motivated Strategies for Learning Questionnaire (MSLQ) to typify score reliabilities for all scales on the instrument and to examine potential sources of measurement error across studies which used these scales. Average reliability coefficients range from a low of 0.61 for the learning strategies scale, help seeking, and a high of 0.88 for the motivation scale, self-efficacy of learning and performance. Overall, results of reliability generalization studies for both the motivation and learning strategies sections of the MSLQ demonstrate that the MSLQ can be used across a variety of different samples with reasonable confidence for obtaining generally reliable scores. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]