Teaching research methods for 30 years provided the author with insights into effective ways to enthusiastically engage both students in the games that scientists play. Students rapidly learn relevant rules for planning and conducting research, writing clearly, concisely, and correctly, as well as critiquing refereed articles. This easy to read eBook covers a broad knowledge base and integrates many of the concepts with real world empirical examples. Acquiring the functional skills necessary to become an independent, critically thinking scientist is a worthy purpose. Extensive discussions include science, variability, experimental design, statistics, and relevant rules for becoming a player in science. Research methods mastery comes from intense learning of the specific information and extensive practice situations to develop expertise. Indeed, reading, writing, and reciting the rules involved in scientific problem solving, designing sound experiments, analyzing data appropriately, and examining internally valid and invalid conclusions contributes to mastery. Once students are able to apply the knowledge, write coherent reviews evaluating the literature, determine causal relationships leading to evidence-based decision-making, then autonomy is apparent. Reading and studying the third edition of this Research Methods eBook will help you become a productive consumer and investigator of science. Increasing your knowledge on the rules for planning and conducting experiments is important for all types of academic majors. Students from applied physiology and kinesiology, exercise physiology, motor behavior, sport psychology, physical and occupational therapy, and premedicine readily acquire and use this knowledge. This eBook focuses on causal effects as the most important for advancing science, whereas threats to internal validity are potential confounds. Minimizing threats to internal validity should be a primary goal in selecting an appropriate experimental design as well as considering appropriate statistical analyses. Engage in research methods, develop functional skills, and become fulfilled.