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Studying identical twins reveals insights to auditory processing skills and genetics. If auditory processing skills are hereditary, we could eventually determine why and how children develop central auditory processing disorder (CAPD).

For a 2007 study, scientists attended a twins festival and tested identical twins on this topic. First they ensured that the twins were identical with a DNA test. Then they gave each twin a hearing test to rule out anyone who might not have the normal ability to hear sounds.

They found 194 pairs of twins who fit their criteria. Next, the twins took tests that helped the researchers determine whether or not CAPD was present.

Four tests of five placed a high emphasis on discerning different sounds simultaneously. Researchers found that a significantly high number of identical twins showed evidence of having similar auditory processing skills. From the tests, it can be concluded that ability to listen to two different sounds at the same time is likely due to genetics.

Diagnosing APD

CAPD diagnoses aren’t given until at least the age of five. Thus, it’s possible for many teachers, parents, or educators to conclude that other learning disorders are the primary problem.

You might notice that your child has poor listening skills and doesn’t follow your directions, or can’t remember what he’s supposed to do when he walks into the kitchen. An audiologist might make the correct diagnosis when the child is older. But in the meantime, your child might be diagnosed with another learning disability. A misdiagnosis or additional diagnosis can be a red herring for doctors, you and your child as you seek identification and treatment of your child’s auditory challenges.

We know that CAPD seriously impairs a child’s ability to learn language and read – and this can’t go on for too long without affecting your child’s efforts later in life. If you suspect that your child has CAPD, you can do something today. Gemm Learning offers a program that can help, and your child needs your help. Research our programs designed for children with learning disabilities today.


The National Institute on Deafness and Other Communication Disorders (NIDCD): “Ability to Listen to Two Things at Once is Largely Inherited, Says Twin Study.”