Psychometry

Psychometry began as a piece of nineteenth-century American physiology rather than spiritualism. Joseph Rodes Buchanan, a professor interested in the physical basis of mental states, coined the term in 1842, literally "soul measuring," after reporting that certain of his students, holding a sealed vial containing an unnamed drug, could correctly describe sensations matching the drug's known physiological effects. Buchanan believed objects retained a kind of impression of everything they had contacted, readable by a sufficiently sensitive nervous system.

The idea was taken up and extended by William Denton, a geology professor, who from 1854 enlisted his sister Ann Denton Cridge to hold cloth-wrapped mineral and archaeological specimens and describe scenes she associated with them, publishing the results in his 1863 book The Soul of Things. Psychometry moved quickly into spiritualist practice, where a medium holding a deceased person's ring or watch to "read" it for the bereaved became a standard séance technique, and the idea persists today in some self-described psychic detectives who claim to read case details from an item connected to a crime or missing person, a practice with no documented record of investigative success beyond chance and generalisation.

Psychometry has proven difficult to test rigorously for a structural reason: a genuinely blind trial requires an object with a verifiable, independently documented history that neither the reader nor anyone communicating with the reader could infer from context, appearance, or ordinary cues, and most demonstrations, historical and modern, fall short of that standard.

Buchanan's and Denton's own experiments were not blind in this sense: Denton's sister often had background context about the type of specimen involved, and successes were recorded and publicised more consistently than failures. Where psychometry has been evaluated under tighter, blinded conditions, using genuinely unknown objects judged by an outside party against the true facts, it has not produced results exceeding chance. Its persistence as a working technique among some police-consulting psychics has been studied by researchers comparing psychic-assisted and non-assisted case outcomes, generally finding no advantage for the psychic-assisted cases and describing the apparent hits as a mix of cold reading, vague statements later fitted to facts, and selective reporting of the occasional coincidental accuracy. No study meeting ordinary standards of blinding and independent verification has demonstrated psychometry as a genuine perceptual channel.