Absolute Threshold and Vision

What is the absolute threshold and how does it relate to vision? Provide an example of how this influences your perception of an object.

According to Wood, Wood, & Boyd (2011), absolute threshold is the minimum amount of sensory stimulation that can be detected by a person 50% of the time. Absolute threshold can simply be defined as the difference between not being able to perceive a stimulus and just being able to perceive it. Wood, Wood, & Boyd (2011) used a threshold of a doorway to explain absolute threshold. In terms of vision, the absolute threshold refers to the smallest level of light that can be detected. An example would be a lit candle. If a person can see it from a distance of 5 miles but not further, then that person’s absolute threshold of vision is 5 miles.

Wood, S. E., Wood, E. G., & Boyd, D. (2011). The World of Psychology (7th ed.). Boston, MA: Pearson Education, Inc.

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