Anne Treisman (1935-2018) was one of the most influential attention researchers, known for her early filter theory of attention and especially for feature integration theory (FIT), which explained how the visual system combines individual features (color, shape, orientation) into unified object percepts. Her elegant experimental paradigms and theoretical clarity set the standard for attention research for decades.
Key Structures
- Feature Integration Theory — Treisman's theory that focused attention is required to bind individual visual features (color, shape, orientation) into unified object representations.
- Visual Search — The perceptual task of locating a target among distractors, used extensively to study how attention is deployed across visual displays.
- Filter Theory of Attention — Broadbent's foundational model proposing that attention operates as an early filter, selecting information based on physical characteristics before semantic analysis.
- Selective Attention — The cognitive process of focusing on one particular input or task while ignoring others, enabling efficient processing in a world of overwhelming sensory information.
Key Functions
- Developed feature integration theory (FIT) explaining how attention binds separate visual features (color, shape, orientation) into coherent objects.
- also proposed the attenuation model of selective attention.
Feature Integration Theory
FIT (1980) proposed that visual features are initially registered in parallel across the visual field by specialized feature maps (one for color, one for orientation, etc.), but that binding these features into integrated object representations (perceiving a red vertical bar as a single object) requires focused spatial attention. This explained why visual search for a feature (red among green) is fast and parallel ("pop out"), while search for a conjunction of features (red vertical among red horizontal and green vertical) is slow and serial — it requires attention to visit each location and bind features together.
Before FIT, Treisman made fundamental contributions to auditory attention. Her attenuation model (1964) proposed that unattended information is not completely blocked (as Broadbent's filter theory suggested) but is attenuated — reduced in processing intensity. This explained how important information (like hearing one's own name) can break through from the unattended channel. The attenuation model provided a more flexible and realistic account of selective attention than the all-or-none filter model. Throughout her career, Treisman combined theoretical elegance with experimental ingenuity.
Disorders
- Balint's syndrome (binding deficits) — Triad of simultanagnosia (can't see multiple objects), optic ataxia (can't reach accurately), and oculomotor apraxia (can't voluntarily direct gaze).
- Visual agnosia — Inability to recognize objects by sight despite intact visual acuity; subtypes include apperceptive (impaired shape perception) and associative (impaired meaning assignment).
- Attention deficits in schizophrenia