Localizing damage in the functional architecture: The distinction between implicit and explicit processing in deep dyslexia

Dyslexic Characteristics of Chinese-Speaking Semantic Variant of Primary Progressive Aphasia

“…with a tendency to produce errors that appeared to be semantically related to the target words {34}. The failure to produce a phonologically matched but semantically relevant response suggests an impairment of processes mediating the access of stimuli to the visual word form system {45}. The current literature mainly describes this phenomenon in alphabetic languages, with deep dyslexia largely being observed in the left hemisphere, especially in relation to large perisylvian lesions extending to frontal lobe {44}.…”

Effect of phonetic complexity on word reading and repetition in deep dyslexia

“…Cumulatively, these results indicate that JO is sensitive to phonological information for words and nonwords despite a profound inability to produce these latter items aloud. This pattern of performance suggests that the locus of impairment includes components of production processes along with access difficulty relating to word level phonology (Colangelo & Buchanan, 2007).…”

Semantic typicality effects in acquired dyslexia: Evidence for semantic impairment in deep dyslexia

“…One critical aspect of FIT relates to how orthographic, semantic, and phonological representations are accessed, a feature of the model referred to PEIR ( P roduction, E xplicit access, I mplicit access, R epresentation) (Buchanan et al, 2003). PEIR proposes that production relies on explicit access, which relies on implicit access, which relies on intact representations (Buchanan et al, 2003; Colangelo & Buchanan, 2007). Authors of FIT propose that deep dyslexia is the result of a deficit in explicit access at the level of phonological production (Colangelo & Buchanan, 2007).…”

“…PEIR proposes that production relies on explicit access, which relies on implicit access, which relies on intact representations (Buchanan et al, 2003; Colangelo & Buchanan, 2007). Authors of FIT propose that deep dyslexia is the result of a deficit in explicit access at the level of phonological production (Colangelo & Buchanan, 2007). …”

“…This hypothesis is based primarily on data from a single case of deep dyslexia, patient JO, whose responses the authors interpret as intact implicit access to semantics, intact explicit access to semantics in the absence of production, and deficient explicit access in tasks requiring production (Colangelo & Buchanan, 2005, 2007). To test implicit access, JO completed a lexical decision task and performed within accuracy ranges of controls, leading the authors to conclude that implicit semantic processing was intact (Colangelo & Buchanan, 2005).…”