Final answer:
Dyslexia is a developmental language disorder that affects reading achievement and is not related to intelligence.
Step-by-step explanation:
The developmental language disorder in which reading achievement is substantially below the level predicted by IQ or age is identified as dyslexia. Dyslexia is a specific learning disability that affects a person's ability to read, including difficulties with decoding, fluency, and comprehension. It is important to note that dyslexia is not related to intelligence and can occur in individuals with average to above-average IQ.