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about the criteria (i.e., frames of reference) that were set up by parapsychologists to identify and circumscribe their emerging discipline. Those criteria can be found unambiguously set forth in several early publications, but they were more neatly brought together and published in PARAPSYCHOLOGY: SOURCES OF INFORMATION, by Rhea A. White and Laura A. Dale published in 1973. Since interested readers will probably have difficulty in locating a copy of this book, the formal definition of parapsychology found on page 13 is provided as follows: "PARAPSYCHOLOGY (the modern and more restrictive term for psychical research) is the field which uses the scientific method to investigate phenomena for which there appear to be no normal (that is [physical] sensory) explanations. "Basically this refers to phenomena subsumed under the general term PSI, which in its motor aspect is called psychokinesis and in its more familiar mental aspect, extrasensory perception (comprising telepathy, clairvoyance, and precognition). All these phenomena have been observed under laboratory conditions. "In the vastly more complex and intricate world of actual life, some form of PSI often seems to be a probable explanation of such human experiences as dreams that come true, waking visions of events occurring at a distance, inexplicable hunches, and similar occurrences. "PSI is also a useful concept in explaining much that happens in mediumship. Since parapsychologists have established that PSI is a part of living behavior, many have hypothesized that what in the early years of psychical research was thought to be evidence of communication with the dead can better be explained in terms of the combination of some form of PSI with the dramatizing propensities of the unconscious minds of the medium and other persons involved.