OCAL language is the vehicle by means of which the child communicates his ideas, his wishes, and his attitudes to other persons. The capacity to exchange words and other symbols of ideas and feelings obviously serves to satisfy a variety of needs. It is~through this avenue that children secure not_only information but a great deal of experience. Language is a means of both personalexpFession and social communication. It is, indeed, one of the principal factors in affecting personality development and social growth.The jibility to_ use _words, that is^jojiommunicate verbally, is de-pendent_for its_development_upon both environmental stimulation and physical growth. A child cannot use word^sj^mB^ls^^gnd^words are, symbols, of experiences-until hehas reached a stage of experiential maturation which m^kgs_^ossi5ksuch an intellec^iractivity. Neither can he speak intelligibly until his vocal organs and related structures are sufficiently mature to permit of such intricate responses. Many animals, especially those of a higher infrahuman variety, possess elaboratephysical equipment for vocalization, yet man aitialities in the form aIone^^the_capacitv to use his structural, of fluent and meaningful speech.No two children are precisely alike, and no two encounter exactly the same situations. Thus there is no,such thing as simiW hark-_££Qunds_jor the interpretation of_£xperience, and each child will re-
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