Feature Detection Theory is a cognitive theory developed in the 1970s that explains how sensory information is processed and interpreted. This theory suggests that the brain is constantly analyzing the environment and detecting meaningful stimuli, or features, in order to create a mental representation of the environment. Feature detection theory contends that the brain is able to detect patterns of stimuli and categorize them into meaningful objects, allowing for efficient processing and response.
The theory was first proposed by psychologist David Marr in 1971 as an alternative to Gestalt principles, which suggest that the brain organizes information into meaningful wholes. Marr argued that the brain first detects features in sensory input before organizing these features into meaningful objects. This theory has been modified over the years as new research has been conducted.
Feature detection theory proposes that the brain is composed of special neurons, called feature detectors, which are sensitive to specific features or patterns in the environment. These feature detectors respond to a particular stimulus or set of stimuli, allowing the brain to identify and respond to features in the environment. For example, if a person is looking at a tree, the feature detectors in the brain may detect the edges of the tree as well as the shape of the leaves. The brain then interprets these features and forms a mental representation of the tree.
The feature detection theory has been used to explain a variety of cognitive processes, such as visual perception, object recognition, and language processing. It has been suggested that feature detection is also involved in the processing of emotions, as the brain is able to detect patterns in facial expressions and body language.
Feature detection theory has been a valuable tool for understanding how the brain processes and interprets sensory information. It has been used to explain a variety of cognitive processes and has been supported by a large body of research. While the theory has been modified over the years, it remains an important part of cognitive science.
References
Marr, D. (1971). Simple memory: a theory for archicortex. Philosophical Transactions of the Royal Society of London B, 262(841), 23-81.
Gibson, J. J. (1966). The senses considered as perceptual systems. Boston, MA: Houghton Mifflin.
Ullman, S. (1984). Visual routines. Cognition, 18(1), 97-159.
Norman, D. A., & Shallice, T. (1986). Attention to action: Willed and automatic control of behavior. In R. J. Davidson, G. E. Schwartz & D. Shapiro (Eds.), Consciousness and self-regulation (Vol. 4, pp. 1-18). New York, NY: Plenum.
Kanwisher, N., & Wojciulik, E. (2000). Visual attention: Insights from brain imaging. Nature Reviews Neuroscience, 1(2), 91-100.