Psychology 2115A/B Lecture Notes - Lecture 2: Perseveration, Psychophysics, Psychometric Function
16 Oct 2016
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Classical psychophysics (cid:498)relationship between physical intensity of stimulus and psychological response by the recipient(cid:499) Example being shown a dim light, will not have a large response, shown a. Fechner is the father of psychophysics bright light and having a larger response. Ex run experiment of different intensities and ask if they heard/feel/see. For low intensities, people will never say yes. Then you hit the minimum threshold and probability goes up to one. When above threshold, people will say yes all of the time because they something can detect the stimuli. Psycho refers to psychology, metro measurement. Ex experiment with dependent and independent variables. Two techniques to run an experiment (fechner"s: method of limits. People presented with stimuli which will either start with low intensity and gradually increase and will be asked with each step, did you sense the stimuli. Purpose is to determine when the threshold is reached.
