How does parapsychology differ from hard science? Since the origins of psychical research, parapsychology has been hard-pressed to convince sceptics that it is a legitimate science. This comprehensive collection of essays, edited by a distinguished philosopher and pioneering scholar in the field of parapsychological research, stimulates discussion as it seeks to clarify and explore the philosophical problems implied by such alleged phenomena as ESP, psychokinesis, and out-of-body experiences. Aside from being a critical analysis, this book provides the reader with a historical view of the debates surrounding psychical research. This book is excellent for students and professionals in the fields of science, social science, philosophy, psychology, and for anyone interested in the methods of scientific inquiry and the way it seeks to explore the uncharted territory of human potential.