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3 Cards in this Set
- Front
- Back
WEBERS LAW |
Weber's Law is related to the Just Noticeable Difference (also known as the difference threshold), which is the minimum difference in stimulation that a person can detect 50 percent of the time. But Ernst Weber noted that for people to really perceive a difference, the stimuli must differ by a constant "proportion" (%) not a constant "amount". |
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FECHNERS LAW |
For any given stimulus, JND's are created equal; that is, each additional JND feels subjectively like one incremental unit in intensity. Subjective experience can be predicted mathematically |
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STEVEN'S POWER LAW |
Does not apply to all senses and stimuli people can accurately rate subjective intensity on a numerical scale. Intensity grows arithmetically, actual magnitude of stimulus grows exponentially |