Unconditioned Stimulus (UCS): In classical conditioning, the stimulus that elicits an unconditioned response.
非条件刺激：在经典条件作用中，引起非条件反应的刺激。
Unconscious: The domain of the psyche that stores repressed urges and primitive impulses.
潜意识：储存被压抑的冲动和原始冲动的心理领域。
Validity: The extent to which a test measures what it was intended to measure.
效度：测试能够测量出其目的的程度。
Variable: In an experimental setting, a factor that varies in amount and kind.
变量：实验中，在数量和种类上发生变化的因素。