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LBLD consists of dyscalculia which comprises the reading of numbers sequentially, learning the time table, and telling time; [6] dyslexia; and difficulties associated with written language such as trouble learning new vocabulary, letters and alphabets.
It tends to become more apparent as children get older; however, symptoms can appear as early as preschool. [15] Common symptoms of dyscalculia are having difficulty with mental math, trouble analyzing time and reading an analog clock, struggle with motor sequencing that involves numbers, and often counting on fingers when adding numbers. [16]
These problems, however, are not enough to warrant an official diagnosis. Learning disability, on the other hand, is an official clinical diagnosis, whereby the individual meets certain criteria, as determined by a professional (such as a psychologist, psychiatrist, speech-language pathologist, or paediatrician).
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Developmental disability is a diverse group of chronic conditions, comprising mental or physical impairments that arise before adulthood. Developmental disabilities cause individuals living with them many difficulties in certain areas of life, especially in "language, mobility, learning, self-help, and independent living". [1]
The full chapter can be found on pages 177 to 213 of Volume 1, which contains all (sub)categories of the ICD-9. Volume 2 is an alphabetical index of Volume 1. Both volumes can be downloaded for free from the website of the World Health Organization. See here for a PDF file of only the mental disorders chapter.
The age of diagnosis can range from 9 months to 14 years, and the mean age is 4 years old in the USA. [11] On average each case of ASD is tested at three different diagnostic centers before confirmed. Early diagnosis of the disorder can diminish familial stress, speed up referral to special educational programs and influence family planning. [12]
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 ...