Psychometry (from Greek: ψυχή, psukhē, "spirit, soul" and μέτρον, metron, "measure"), also known as token-object reading, or psychoscopy, is a form of extra-sensory perception characterized by the claimed ability to make relevant associations from an object of unknown history by making physical contact with that object. Supporters assert that an object may have an energy field that transfers knowledge regarding that object's history.