Sensation and Perception
Sensation: process in which the stimulation of receptor cells sends nerve impulses to the brain.
Perception: process in which the brain interprets sensations, giving them order and meaning.
Just Noticeable Difference (JND) (minimum difference accurately perceived). Sitting in a
dark room…having two lights shone from different doors and asked which light is
Weber’s Law (JND in sensation is always a constant proportion of the initial intensity).
For lighter things, we can spot smaller differences. For heavier things, we don’t really
notice small changes (1g in a 1kg object…hard to notice).
Fechner’s Law (as intensity increases, larger increases are needed to produce
subjectively equal changes)
Sensory threshold. When c