When reading aloud, it is common to confuse words or letters, nerves, pressure or sight can influence this failure; however, when confusion or distortion is a rule, that person suffers from dyslexia.

Dyslexia means in Greek "word difficulty". It occurs when a child omits, confuses or distorts the sounds he hears through dictation, as well as the words he reads or writes.

These confusions can occur during preschool and the first year of primary school, the infant is in the process of initiation of writing and reading and still does not learn to make completely correct discriminations. But if errors persist in later stages, it could be a case of dyslexia.



Brain researchers suggest that the origin of these faults is a neurological disorder. Other scientists point to genetic deficiencies, particularly on chromosome 15, associated with an increased susceptibility to reading problems. However, the results are far from conclusive.

The teacher Laura Aragón, head of the Psychological Evaluation Unit of the School of Higher Studies Iztacala of the UNAM , doubt the neurological origin of dyslexia, "because, if it were, it would occur in any region of the world and in Japan, particularly, there are no cases or are very isolated." Their studies conclude that the detonator is poor learning.

"Some children do not learn to read or write because they have problems in their intellectual capacity; others, for lack of knowledge; for example: a small child who did not attend preschool. On the other hand, a dyslexic child has the ability to read or write, but he makes mistakes. "

The university psychologist designed the IDETID-LEA test, which allows the diagnosis of dyslexic-type errors in children from the second to fifth year of primary school. This consists of three evaluations (reading, copying and dictation), which include from vowels and words to prose and verses. The specialist developed different tests, one for students of each grade level.

The application is made in several sessions, then the detected errors are classified to locate the area in which they are presented. This information allows us to plan the intervention goals and design the treatment (number of sessions per week, duration of each, etc.).

The IDETID-LEA test was validated in more than 600 students of public schools in the Metropolitan Zone of the Valley of Mexico. Since then, it is a basic instrument of service to children with dyslexia that offers FES Iztacala of the UNAM.

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