psychometry (n.)

word-forming element meaning "mind, mental; spirit, unconscious," from Greek combining form of psykhē "the soul, mind, spirit; life, one's life, the invisible animating principle or entity which occupies and directs the physical body; understanding, the mind (as the seat of thought), faculty of reason" (see psyche). It also was used to form compounds in Greek, such as psychapates "soul-beguiling" (with apate "deceit").

word-forming element meaning "process of measuring," Middle English -metrie, from French -metrie, from Latin -metria, from Greek -metria "a measuring of," from -metros "measurer of," from metron "measure," from PIE root *me- (2) "to measure."

"the science of measuring mental capacities and processes," 1917, from psychometry; also see -ics.