13 letters · 33 points in Scrabble
noun the branch of psychology concerned with quantitative relations between physical stimuli and their psychological effects
originEtymology tree Ancient Greek ψῡχή (psūkhḗ) Ancient Greek ψῡχο- (psūkho-)der. English psycho- English physics English psychophysics From psycho- + physics.
Etymology from Wiktionary, CC BY-SA 3.0