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Spatial attention in encoding letter combinations
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DOI：10.1038/s41598-021-03558-4.png)
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Abstract
En 中文
Reading requires the correct identification of letters and letter positions within words. Selective attention is, therefore, required to select chunks of the text for sequential processing. Despite the extensive literature on visual attention, the well-known effects of spatial cues in simple perceptual tasks cannot inform us about the role of attention in a task as complex as reading. Here, we systematically manipulate spatial attention in a multi-letter processing task to understand the effects of spatial cues on letter encoding in typical adults. Overall, endogenous (voluntary) cue benefits were larger than exogenous (reflexive). We show that cue benefits are greater in the left than in the right visual field and larger for the most crowded letter positions. Endogenous valid cues reduced errors due to confusing letter positions more than misidentifications, specifically for the most crowded letter positions. Therefore, shifting endogenous attention along a line of text is likely an important mechanism to alleviate the effects of crowding on encoding letters within words. Our results help set the premise for constructing theories about how specific mechanisms of attention support reading development in children. Understanding the link between reading development and attention mechanisms has far-reaching implications for effectively addressing the needs of children with reading disabilities.
Keywords:
VISUAL-ATTENTION
DEVELOPMENTAL DYSLEXIA
LETTER RECOGNITION
WORD RECOGNITION
SERIAL POSITION
SPAN DEFICIT
PSYCHOPHYSICS
COMPONENTS
RESOLUTION
VOLUNTARY
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