This book, written in the style of an undergraduate textbook, is intended as an introductory survey of present knowledge in the field

of parapsychology. For the most part it is experimentally oriented and based largely on the work done at the Duke University Parapsychology Laboratory over the past three decades. Part I deals with definitions and basic concepts, research methods, classes of data and some suggested lines of integration of parapsychology with physics, psychology, and other fields. A representative, if by no means comprehensive, set of bibliographic references is given at the end of each chapter. Part II, dealing with testing techniques and statistical methods, provides valuable hints for the beginner in the field. Some handy statistical tables are appended. The reader who wishes a more critical introduction to the experimental side of the field might do well to start with Extra-Sensory Perception After Sixty Years (1940) by the authors of the present volume and others.