Wider recognition in peripheral vision common to different subtypes of dyslexia

Lorusso, Maria Luisa; Facoetti, Andrea; Pesenti, S.; Cattaneo, Carmen; Molteni, Massimo; Geiger, Gad

doi:10.1016/j.visres.2004.05.001

Cited by 58 publications

(54 citation statements)

References 39 publications

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“…Moreover, the lateral interference between adjacent letters (i.e., crowding; for a review, see Levi, 2008) is abnormal in dyslexia (Spinelli, De Luca, Judica, & Zoccolotti, 2002;Atkinson, 1991). In particular, dyslexics seem to have more crowding near the fovea than normal readers (Lorusso et al, 2004;Geiger & Lettvin, 1987). Recent studies show that crowding represents a limit for reading in skilled adults (e.g., Pelli et al, 2007).…”

Section: The Role Of Noise Exclusion Deficitsmentioning

confidence: 99%

Multisensory Spatial Attention Deficits Are Predictive of Phonological Decoding Skills in Developmental Dyslexia

Facoetti

Trussardi

Ruffino

et al. 2010

Journal of Cognitive Neuroscience

246

242

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Although the dominant approach posits that developmental dyslexia arises from deficits in systems that are exclusively linguistic in nature (i.e., phonological deficit theory), dyslexics show a variety of lower level deficits in sensory and attentional processing. Although their link to the reading disorder remains contentious, recent empirical and computational studies suggest that spatial attention plays an important role in phonological decoding. The present behavioral study investigated exogenous spatial attention in dyslexic children and matched controls by measuring RTs to visual and auditory stimuli in cued-detection tasks. Dyslexics with poor nonword decoding accuracy showed a slower time course of visual and auditory (multisensory) spatial attention compared with both chronological age and reading level controls as well as compared with dyslexics with slow but accurate nonword decoding. Individual differences in the time course of multisensory spatial attention accounted for 31% of unique variance in the nonword reading performance of the entire dyslexic sample after controlling for age, IQ, and phonological skills. The present study suggests that multisensory "sluggish attention shifting"-related to a temporoparietal dysfunction-selectively impairs the sublexical mechanisms that are critical for reading development. These findings may offer a new approach for early identification and remediation of developmental dyslexia.

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Section: The Role Of Noise Exclusion Deficitsmentioning

confidence: 99%

Multisensory Spatial Attention Deficits Are Predictive of Phonological Decoding Skills in Developmental Dyslexia

Facoetti

Trussardi

Ruffino

et al. 2010

Journal of Cognitive Neuroscience

246

242

View full text Add to dashboard Cite

show abstract

“…Frequent-word reading is normally done by a rapid conversion of the visual word form to a lexical representation (Coltheart, 1978;Coltheart, Curtis, Atkins, & Haller, 1993). FWRI children are traditionally termed as "dyseidetics" (Boder, 1970;Lorusso, Facoetti, & Pesenti, 2004;Milne et al, 2003). It was assumed that they have a deficit in visual word Gestalt recognition (Boder, 1970) or some other visual deficit (Farmer & Klein, 1995).…”

Section: Diagnostic Subtypes Of Developmental Dyslexiamentioning

confidence: 99%

Different letter-processing strategies in diagnostic subgroups of developmental dyslexia

Lachmann

Leeuwen

2008

Cognitive Neuropsychology

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Normally reading adults (N = 15) and primary school children (N = 24) and two diagnostic subgroups of children with developmental dyslexia (N = 21)-all native German speakers-performed a successive same-different task with pairs of letters and nonletters (pseudoletters or geometrical shapes). The first item of a pair was always presented on its own, and the second either on its own or surrounded by a congruent or incongruent nontarget shape. Adults showed congruence effects with nonletters but not with letters, and children with both types of stimuli. Frequent-word reading-impaired dyslexics (N = 11) in addition showed dramatically slower overall reaction times. Nonword reading-impaired dyslexics (N = 10) showed congruence effects with nonletters but negative congruence effects with letters. The results support the notion that normal readers have established a special visual processing strategy for letters. Processing speed rather than reading expertise seems crucial for this strategy to emerge. The contrasting effects between subgroups of dyslexics reveal specific underlying deficits.

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“…This is contrasted with poor response characteristics in the central visual field. Using Geiger's setup, another two studies confirmed that individuals with dyslexia have a broader peripheral vision (Lorusso et al, 2004;Perry, Dember, Warm, & Sacks, 1989). In terms of empirical evidence, only a few research studies have examined whether individuals with dyslexia have a better peripheral vision than normal readers.…”

Section: Dyslexia and Enhanced Peripheral Visionmentioning

confidence: 97%

Is Reading Impairment Associated with Enhanced Holistic Processing in Comparative Visual Search?

Wang

Schneps²,

Antonenko

et al. 2016

Dyslexia

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This study explores a proposition that individuals with dyslexia develop enhanced peripheral vision to process visual-spatial information holistically. Participants included 18 individuals diagnosed with dyslexia and 18 who were not. The experiment used a comparative visual search design consisting of two blocks of 72 trials. Each trial presented two halves of the display each comprising three kinds of shapes in three colours to be compared side-by-side. Participants performed a conjunctive search to ascertain whether the two halves were identical. In the first block, participants were provided no instruction regarding the visual-spatial processing strategy they were to employ. In the second block, participants were instructed to use a holistic processing strategy-to defocus their attention and perform the comparison by examining the whole screen at once. The results did not support the hypothesis associating dyslexia with talents for holistic visual processing. Using holistic processing strategy, both groups scored lower in accuracy and reacted faster, compared to the first block. Impaired readers consistently reacted more slowly and did not exhibit enhanced accuracy. Given the extant evidence of strengths for holistic visual processing in impaired readers, these findings are important because they suggest such strengths may be task dependent. Copyright © 2016 John Wiley & Sons, Ltd.

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Wider recognition in peripheral vision common to different subtypes of dyslexia

Cited by 58 publications

References 39 publications

Multisensory Spatial Attention Deficits Are Predictive of Phonological Decoding Skills in Developmental Dyslexia

Multisensory Spatial Attention Deficits Are Predictive of Phonological Decoding Skills in Developmental Dyslexia

Different letter-processing strategies in diagnostic subgroups of developmental dyslexia

Is Reading Impairment Associated with Enhanced Holistic Processing in Comparative Visual Search?

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