Definition: The main feature is a specific and significant impairment in the development of reading skills that is not solely accounted for by mental age, visual acuity problems, or inadequate schooling. Reading comprehension skill, reading word recognition, oral reading skill, and performance of tasks requiring reading may all be affected. Spelling difficulties are frequently associated with specific reading disorder and often remain into adolescence even after some progress in reading has been made. Specific developmental disorders of reading are commonly preceded by a history of disorders in speech or language development. Associated ...[+++]emotional and behavioural disturbances are common during the school age period. | Backward reading Developmental dyslexia Specific reading retardation

stadia-rod [ stadia rod | stadia ]

graduated staff | level rod | stadia rod | stadia board | range pole

read-only memory | ROM,see also read-only storage,read-only store [Abbr.]

fixed storage | nonerasable storage | read-only memory | read-only storage | read-only store

Definition: The main feature is a specific and significant impairment in the development of spelling skills in the absence of a history of specific reading disorder, which is not solely accounted for by low mental age, visual acuity problems, or inadequate schooling. The ability to spell orally and to write out words correctly are both affected. | Specific spelling retardation (without reading disorder)

Definition: Disorders in which normal patterns of language acquisition are disturbed from the early stages of development. The conditions are not directly attributable to neurological or speech mechanism abnormalities, sensory impairments, mental retardation, or environmental factors. Specific developmental disorders of speech and language are often followed by associated problems, such as difficulties in reading and spelling, abnormalities in interpersonal relationships, and emotional and behavioural disorders.