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Dyslexia does not affect general intelligence, but is often co-diagnosed with ADHD. [1] [2] There are at least three sub-types of dyslexia that have been recognized by researchers: orthographic, or surface dyslexia, phonological dyslexia and mixed dyslexia where individuals exhibit symptoms of both orthographic and phonological dyslexia. [3]
The symptoms of phonological dyslexia are very similar to those of deep dyslexia. The major difference between these two dyslexias is that phonological dyslexics do not make semantic errors associated with deep dyslexia. Beauvois and Dérouesné (1979) studied the first case of phonological dyslexia and came up with this term. [5]
Orthographies and dyslexia - How dyslexia manifests in different writing systems. Deep dyslexia - Semantic errors in reading, often substituting related words. Acquired dyslexia (alexia) - Reading difficulties resulting from brain injury. Phonological dyslexia - Difficulty with letter-sound connections and unfamiliar words.
Dyslexia is a heterogeneous, dimensional learning disorder that impairs accurate and fluent word reading and spelling. [65] [66] Typical—but not universal—features include difficulties with phonological awareness; inefficient and often inaccurate processing of sounds in oral language (phonological processing); and verbal working memory ...
Dyslexia and dyscalculia are two learning disorders with different cognitive profiles. Dyslexia and dyscalculia have separable cognitive profiles, mainly a phonological deficit in the case of dyslexia and a deficient number module in the case of dyscalculia. [7] Individuals with dyslexia can be gifted in mathematics while having poor reading ...
Surface dyslexia is a type of dyslexia, or reading disorder. [ 1 ] [ 2 ] According to Marshall & Newcombe's (1973) and McCarthy & Warrington's study (1990), patients with this kind of disorder cannot recognize a word as a whole due to the damage of the left parietal or temporal lobe .
Surface dyslexia was imitated by damaging the orthographic lexicon so that the program made more errors on irregular words than on regular or non-words, just as is observed in surface dyslexia. [6] Phonological dyslexia was similarly modeled by selectively damaging the non-lexical route thereby causing the program to mispronounce non words.
Dyslexia is a learning difficulty that primarily affects the skills involved in accurate and fluent word reading and spelling. Characteristic features of dyslexia are difficulties in phonological awareness, verbal memory and verbal processing speed. Dyslexia occurs across the range of intellectual abilities.
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