This ground-breaking text represents an attempt to make explicit the meaning of science as a guiding philosophy that provides standards for determining truthful knowledge or evidence. The author's motivation for this book was to introduce the principles of the scientific method and to provide a course in critical thinking. A further aim was to achieve those goals without diminishing the importance of caring by the use of examples and illustrations that are specific to communications disorders. The text offers an introduction to the history and philosophy of science, scientific methods, and...