Where does “psychomotor” come from?

I need to work through this chain carefully, but I notice there's a significant problem: the chain provided doesn't actually support the word "psychomotor." The chain given is: English motor ← Ancient Greek ψυχή ← Latin moto ← Ancient Greek -ᾱ ← Proto-Indo-European -eh₂ This chain shows etymologies for "motor" and some Greek/Latin elements, but "psychomotor" is a compound of "psycho-" (from Greek ψυχή "soul/mind") + "motor" (from Latin motus, related to movere "to move"). The chain as written is incoherent—it doesn't represent how either component actually developed, and it creates a circular path (Greek to Latin to Greek to PIE) that doesn't make linguistic sense. To write an accurate one-sentence etymology for "psychomotor," I would need

psychomotor (English): Of or pertaining to the function of muscles under...