psychometric function
the % correct plotted as a function of stimulusintensity
The psychometric function refers to a mathematical model used to describe the relationship between an individual’s sensory perception (e.g., the ability to detect a stimulus) and varying levels of the stimulus itself.
In other words, it describes how well a person is able to perceive something, based on the intensity or strength of the stimulus being presented.
The psychometric function is often represented graphically, with the x-axis showing the level of the stimulus, and the y-axis showing the probability of detecting the stimulus at each level.
By analyzing the shape of the psychometric function, researchers can gain insight into an individual’s ability to detect stimuli, and how sensitive that individual is to variations in stimulus intensity.
The psychometric function is commonly used in fields such as psychology, neuroscience, and ophthalmology, to study perception and sensory processing in humans.
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