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What are our thresholds for perceiving different stimuli, and how do researchers determine people's true thresholds?
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psychophysics
by the philosopher Gustav Fecher, it focuses on the relationship between physical characteristics and magnitude of environmental stimuli and our mental intensity experience of them
absolute thresholds
the minimum amount of stimulation needed for a person to detect a particular stimulus half of the time
the relationship between threshold and sensitivity
they are inverse, higher threshold means lower sensitivity and lower threshold means higher sensitivity
signal detection theory
an approach that measures the thresholds while taking into account the intensity of the stimulus and the psychological biases