Sensory perception shapes how we experience the world, yet not every stimulus registers consciously, and not every change goes unnoticed. Worth adding: while they both involve the minimum intensity of stimulation required for perception, they operate at different stages of the perceptual process. In the study of psychophysics, two foundational concepts help explain the boundary between what we can detect and what we can differentiate: the absolute threshold and the just noticeable difference. The absolute threshold marks the point at which a stimulus becomes detectable, whereas the just noticeable difference quantifies the smallest detectable change between two stimuli.
Just Noticeable Difference Vs Absolute Threshold
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