Abstract

Well-designed experiments require: (1) rigidity, (2) fruitfulness, and (3) economy. Two common faults of design in parapsychology are (1) failure to mix up experiments of different types between which it is intended that a comparison should be made, (2) failure to deal appropriately with cases in which each subject and not each guess must be treated as unit for answering the question intended to be answered. The best parapsychological experimenters are sensitive to design requirements, but there are many experiments done without basic training in experimental method, and hence also failure to observe design.