
Physical impairments can also affect language; hearing loss, brain damage, and mental retardation can influence language development (Gonzalez-Mena, 2007).
What are symptoms of atypical language development?
Here are the milestones and warning signs of atypical language development, taken from "Early Messages," Child Care Video Magazine.
Young Infants (birth to 8 months)
- A general lack of interest in social contact (infant avoids eye contact, holds body rigidly)
- Lack of response to the human voice or other sounds
- At 8 to 9 months, the child stops babbling (infants who are deaf babble at first and then stop).
- The child does not show interest in interacting with objects and caregivers in familiar environments.
- At 9 to 10 months, the child does not follow direction of point.
- At 11 to 12 months, the child does not give, show, or point at objects.
- At 11 to 12 months, the child does not play games such as pat-a-cake or peek-a-boo.
- Has a limited vocabulary
- Uses only short, simple sentences
- Makes many more grammatical errors than other children at the same age
- Has difficulty talking about the future
- Misunderstands questions most of the time
- Is often misunderstood by others
- Displays fewer forms of social play than other children at the same age
- Has difficulty carrying on a conversation

What are the common symptoms of dyslexia?
Here are some common symptoms of dyslexia, taken from Straight Talk About Reading by Susan Hall and Louisa Moats (1999).
- difficulty learning the sounds that go with letters
- trouble with reading of words in isolation or in context
- difficulty recalling words or names that are known (word retrieval problems)
- pronouncing sounds or syllables incorrectly ("basghetti" for spaghetti, or "aminal" for animal)
- difficulty spelling and/or forming letters
- trouble memorizing math facts and calendar concepts
- difficulty managing sentence structure, word choice, and organization in writing
- difficulty organizing in space and time
If you suspect that your child has a communication disorder, it is recommended that you take your child to see a speech therapist or have your child participate in an early intervention program (Gonzalez-Mena, 2007). If your child is showing signs of dyslexia, it is recommended that your child get tested or that he or she sees a school consultant or licensed psychologist (Hall & Moats, 1999). It is best to accurately diagnose the problem before implementing any treatment.