AP Psychology Quiz
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BIOLOGICAL BASES OF BEHAVIOR
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Which choice best defines an absolute threshold in psychophysics?
A
The smallest change in stimulus intensity detected 50% of the time, describing discrimination between two stimuli rather than initial detection.
B
The minimum stimulus intensity detected 50% of the time, reflecting a statistical point of detection rather than a perfect cutoff.
C
A constant proportion of change needed to detect differences, describing Weber's law rather than a minimum detectable intensity.
D
The brain's interpretation of a stimulus as meaningful, which is perception and not quantified by a 50% detection probability.
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