Related Experiment Video
Updated: Dec 6, 2025
09:13
Testing Sensory and Multisensory Function in Children with Autism Spectrum Disorder
Published on: April 22, 2015
16.9K
Perceptual span in individuals with aphasia
1Department of Communication Sciences and Disorders, Temple University.
Aphasiology
|October 12, 2020
Summary
Individuals with aphasia have a reduced perceptual span, seeing fewer words at once during reading. This finding suggests greater cognitive effort is needed for reading comprehension in aphasia.
Area of Science:
- Neurolinguistics
- Cognitive Psychology
- Reading Science
Background:
- Perceptual span, the visual field for effective reading, is influenced by reading proficiency.
- No prior research has explored perceptual span in individuals with aphasia-related reading impairments.
Purpose of the Study:
- To investigate if individuals with aphasia exhibit a smaller perceptual span compared to neurotypical controls.
- To quantify differences in visual processing during reading between these groups.
Main Methods:
- Utilized a gaze-contingent moving windows paradigm during silent reading.
- Employed eye-tracking technology to record reading behavior.
- Analyzed data from 11 individuals with aphasia and 15 neurotypical controls.
Main Results:
- Individuals with aphasia demonstrated a perceptual span encompassing the fixated word plus one word to the right.
- Neurotypical controls had a perceptual span of the fixated word plus two words to the right.
Conclusions:
- Aphasia is associated with a significantly smaller perceptual span compared to controls.
- This reduction in perceptual span likely indicates increased cognitive load and effort during reading comprehension for individuals with aphasia.
More Related Videos
09:27Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills
Published on: January 19, 2024
1.6K
07:12Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
Published on: April 11, 2025
762
Related Concept Videos
01:12Visual Agnosia
703
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
703
01:10Higher Mental Functions of the Brain: Language
2.8K
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
2.8K
01:25Factors Affecting Perception
2.4K
Perception is influenced by perceptual set, context, motivation, and emotion. Perceptual set, or perceptual expectancy, refers to the tendency to perceive things in a particular way, influenced by previous experiences and expectations. This phenomenon affects the interpretation of stimuli, creating a set of mental tendencies and assumptions that impact sensory perceptions of sound, taste, touch, and sight.
An illustrative example of a perceptual set is the scenario where an airline pilot told...
An illustrative example of a perceptual set is the scenario where an airline pilot told...
2.4K
01:12Perceptual Constancy
1.0K
Perceptual constancy is the ability to recognize that objects remain consistent and unchanged even when their appearance varies due to changes in sensory input. There are four main types of perceptual constancy: size constancy, shape constancy, color constancy, and brightness constancy.
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
Size constancy is the recognition that an object remains the same size, even when its image on the retina changes. For instance, a bus is perceived to be large enough to carry people, even if it looks tiny from...
1.0K
01:24Prosopagnosia
580
Prosopagnosia, also known as face blindness, is the inability to recognize faces. In severe cases, individuals with prosopagnosia may not recognize close family members, including parents and spouses, by their faces. For instance, someone with prosopagnosia might walk past their child in a crowd, only realizing their mistake upon noticing their child's distinctive backpack or favorite jacket. Prosopagnosia specifically impairs facial recognition, while the recognition of other objects or...
580
01:24Working Memory
624
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
624