People with this condition find it difficult to process words in order to receive the meaning. It is not a hearing problem and they may well be able to repeat the words back. This may be one of the primary causes of dyslexia. APD is not a medical condition and it is not one which can be treated.
APD should be diagnosed by a trained audiologist. Help should be given in the form of a multi-disciplinary approach to help people develop their own coping strategies together with remedial programmes and assistive technology.
http://home.earthlink.net/~mcoleman/cpdadd.html (This site links APD and ADHD)
APD and its role in Developmental Language Disorder