The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.
Developmental dyslexia, or specific reading disability, is a disorder in which children with normal intelligence and sensory abilities show learning deficits for reading.
Characteristics of dyslexia. The Australian Dyslexic Association (ADA) cautions that it is important to keep in mind that dyslexia occurs on a continuum from mild to severe and no two learners with dyslexia are the same.ndicators in teacher behaviour. For a more extensive list of characteristics in primary school children go to Primary Hints and Tips on the British Dyslexic Association (BDA) website. A list of positive traits displayed by people with dyslexia can be found on the Living with Dyslexia page of this website.