The Paranormal

Paranormal phenomena, parapsychology, psychical research: all these terms refer to the study of anomalous or supernatural phenomena for which we have no natural explanation. While conventional science examines and tries to explain empirical phenomena for which we have good evidence, parapsychology tries to establish the reality of its phenomena by finding evidence. So are these phenomena real or the products of trickery or self-delusion? What kinds of experiments would establish the reality of these phenomena?