This book is being reprinted to fill in the gap in literature on Signal Detection Theory, a theory that is still important in psychology, hearing, vision, audiology, and related subjects. There are a few books at the introductory level for undergraduates

'The book can serve as an excellent study guide for students....equally useful for teachers and researchers in psychology who work with SDT theory. It is very detailed and complete from a didactical point of view. This is not a book that can be read hastily; rather it must be studied.  The methods described here can be used in many other fields as well."

—Glottometrics 9