:::There are people who do parapsychological research following all rules and requirements of sound psychological research. So it cannot be claimed that all parapsychologists deviate from the rigor of the scientific method. They would say: we want that the same standard which applies to psychological, sociological and anthropological research be applied to parapsychological research. But they face the problem that the claims of psychology, sociology and anthropology are not extraordinary, while the claims of parapsychology are extraordinary. And extraordinary claims need extraordinary evidence. A number of statistically significant results is not enough for confirming parapsychological claims.