Reading, by definition, is the ability to recognize and understand written language, an ability that thousands of mothers have given their babies by using this book. To their surprise, they have simultaneously taught their babies to understand spoken language more quickly and easily.
It barely needs to be mentioned that babies learn English (or whatever their native tongue) by constant immersion in the speaking environment of that language. In time, words and phrases become familiar and are understood if they have been repeated often enough and loudly enough in meaningful situations.
Daily conversation is a haphazard method of teaching language, but it does work eventually through sheer repetition. A baby’s vocabulary grows simply through exposure to his language.
Mothers who teach their babies to read, however, greatly improve upon the random and disorganized way in which language is acquired. Reading words must be presented loudly and clearly to insure that they arrive in the brain for storage. The message is reinforced when it goes simultaneously down two pathways – the visual and the auditory pathways.
When Mother carries out an organized reading program, reading words are presented two or three times on the same day for four or five days consecutively, therefore language is no longer random and left to chance. And because the brain is such a highly organized organ, this orderly approach allows language to be learned with great speed and efficiency.
Full article here : http://www.iahp.org/Read.189.0.html