noun
psychophysics
Academic field studying the relationship between physical stimuli and subjective sensations.
精神物理学は、刺激の強さと感覚の関係を研究する学問です。
Psychophysics is the study of the relationship between stimulus intensity and sensation.
Compound of 精神 (mind, spirit) + 物理学 (physics), likely a calque from German 'Psychophysik' or English 'psychophysics'.