In parapsychology, an old criterion for progress is the answer to the question: "Are we doing now more interesting experiments than 20 years ago?
In the same vein, the knowledge we gather is not in terms of truths, or likely states of affairs, but simply, which experiment to do next, from which we learn something new.
Nowadays, I am much more an astrobiologist than a parapsychologist, but it seems there is generally a large overlap in interests in parapsychology and astronomy.
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The Parapsychological Association is an international professional organization of scientists and scholars engaged in the study of psi (or 'psychic') experiences, such as telepathy, clairvoyance, psychokinesis, psychic healing, and precognition. The primary objective of the PA is to achieve a scientific understanding of these experiences.
First established in 1957, the PA has been an affiliated organization of the American Association for the Advancement of Science (AAAS) since 1969. The PA is a non-profit, non-adjudicating organization that endorses no ideologies or beliefs other than the value of rigorous scientific and scholarly inquiry.