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1.1 Psychophysics
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What is threshold?
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Min. amount of a variable that someone can detect 50% of the time.
AKA-- halfway point b/n perfect and random guessing
ex: brightness of light at which a person can detect it 50% of the time
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Terms in this set (43)
What is threshold?
Min. amount of a variable that someone can detect 50% of the time.
AKA-- halfway point b/n perfect and random guessing
ex: brightness of light at which a person can detect it 50% of the time
T/F Threshold and Sensitivity are inversely proportional
T
What is the psychometric function?
Plot of percent light detected against brightness
What is the method of ascending limits?
Increasing brightness incrementally from presentation to presentation
Ex of method of ascending limits
1. Dark Adaptation
2. Snellen VA starting at 20/20 and go backwards