Reading disorders occur when a person has trouble with any part of the reading process. Reading and language-based learning disabilities are commonly called dyslexia. These disorders are present from a young age and usually result from specific differences in the way the brain processes language.
There are many different symptoms and types of reading disorders, and not everyone with a reading disorder has every symptom. People with reading disorders may have problems recognizing words that they already know and may also be poor spellers. Other symptoms may include the following:
- Trouble with handwriting
- Difficulty reading quickly
- Problems reading with correct expression
- Problems understanding the written word
Reading disorders are not a type of intellectual and development disorder, and they are not a sign of lower intelligence or unwillingness to learn.
Types of Reading Disorders
Dyslexia is a brain-based type of learning disability that specifically impairs a person's ability to read. Individuals with dyslexia typically read at levels significantly lower than expected despite having normal intelligence. Although the disorder varies from person to person, common characteristics among people with dyslexia are difficulty with phonological processing (the manipulation of sounds), spelling, and/or rapid visual-verbal responding. Dyslexia can be inherited in some families, and recent studies have identified a number of genes that may predispose an individual to developing dyslexia. Examples of specific types of reading disorders include:
- Word decoding. People who have difficulty sounding out written words; matching the letters to sounds to be able to read a word.
- Lack of fluency. People who lack fluency have difficulty reading quickly, accurately, and with proper expression (if reading aloud).
- Poor reading comprehension. People with poor reading comprehension have trouble understanding what they read.
A related problem is alexia (pronounced uh-LEK-see-uh), or an acquired inability to read. Unlike most reading disabilities, which are present from when a child starts to learn to read, people with alexia were once able to read but lost the ability after a stroke or an injury to the area of the brain involved with reading.