PSYCH 2E03 Chapter 1: Chapter 1
25 Feb 2016
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Document Summary
Even though perception is not a feature of the physical world, psychologists have developed methods to quantify and compare our perceptions. May offer clues about the nature of the brain, the way it processes information, and ultimately, the biological processes that lead to sensation and perception. Function: mathematical description of how one variable is related to another; generally expressed as a formula. Participant sees a light, adjust intensity bright or lower until they can no longer detect it. 1 so we know when to expect to see the light or not seen. Large variability around absolute threshold for humans: biological systems are noisy (neuron part of visual pathway, baseline fires 1-2. By convention, most psychometrics use the 75% brighter/louder response level as the measure for. Imagine you start with a different target stimulus, perhaps at point b. As intensity shifts to the right, so does the thresholdso need larger change for a noticeable difference.
