W. Gude says in his treatise, remarkable alike for acuteness and clearness, "Principles and Outlines of the Exposition of a Scheme of Instruction for an Institution for Deaf-Mutes" ("Grundsätze und Grundzüge zur Aufstellung eines Lehrplans für eine Taubstummen-Anstalt," 1881): "The utterances of tones and of articulate sounds called forth by involuntary stimulus during the first years, in deaf-mutes, are such unimportant motor phenomena that they are not immediately followed by a motor sensation. But when the deaf-mute child is more awake mentally, he perceives that his relatives make movements of the mouth in their intercourse, and repeated attempts of those about him to make themselves intelligible by pronouncing certain words to him are not entirely without effect upon the deaf-mute that is intellectually active. When such deaf-mutes now direct their attention to the matter, they succeed in regard to only a part of the sounds—those that are conspicuous to the eye in their utterance—in getting a tolerable imitation. Individual deaf-mutes go so far, in fact, as to understand various words correctly without repeating them; others succeed gradually in repeating such words as 'papa, mamma,' so that one can understand what is meant. Those who are deaf-mutes from birth do not, however, of themselves, succeed in imitating accurately other vocal sounds in general."
A deaf-mute, who had not been instructed, explained to Romanes, at a later period when he had learned the sign-language, that he had before thought in "images," which means nothing else than that he, in place of the words heard (in our case) and the digital signs seen (in his case), had made use of memory-images gained from visual impressions, for distinguishing his concepts. Laura Bridgman, too, a person in general the subject of very incorrect inferences, who was not blind and deaf from birth, could form a small number of concepts that were above the lowest grade. These originated from the materials furnished by the sense of touch, the muscular sense and general sensibility, before she had learned a sort of finger-language. But she had learned to speak somewhat before she became dumb and blind. Children with sight, born deaf, seem not to be able to perform the simplest arithmetical operations, e. g., 214-96 and 908 X 70 (according to Asch, 1865), until after several years of continuous instruction in articulate speaking. They do succeed, however, and that without sound-images of words, and perhaps, too, without sight-images of words; in mental arithmetic without knowledge of written figures, by help of the touch-images of words which the tongue furnishes.
In any case uneducated persons born deaf can count by means of the fingers without the knowledge of figures; and, when they go beyond 10, the notched stick comes to their aid (Sicard and Degerando).
The language of gesture and feature in very young children, born dumb and not treated differently from other children, shows also, in most abundant measure, that concepts are formed without words. The child born deaf uses the primitive language of gesture to the same extent as does the child that has his hearing; the former makes himself intelligible by actions and sounds as the latter does, so that his deficiency is not suspected. This natural language is also understood by the child born deaf, so far as it is recognizable by his eye. In the look and the features of his mother he reads her mood. But he very early becomes quiet and develops for himself, "out of unconscious gesticulation, the gesture language, which at first is not conventional, nay, is not in the strict sense quite a sign-language, but a mimetic-plastic representation of the influences experienced from the external world," since the deaf-mute imitates movements perceived, and the attitude of persons and the position of objects. Upon this pantomime alone rests the possibility of coming to an understanding, within a certain range, with deaf-mutes that have had no instruction at all. It can not, therefore, in its elementary form be conventional, as Hill, to whom I owe these data, rightly maintains. He writes concerning the child born deaf: "His voice seems just like that of other children. He screams, weeps, according as he feels uncomfortable; he starts when frightened by any noise. Even friendly address, toying, fun, serious threats, are understood by him as early as by any child." But he does not hear his own voice; it is not sound that frightens him, but the concussion; it is not the pleasant word that delights him, but the pleasant countenance of his mother. "It even happens, not seldom, that through encouragement to use the voice, these children acquire a series of articulate sounds, and a number of combinations of sounds, which they employ as the expression of their wishes." They not only point out the object desired, not only imitate movements that are to procure what they want, but they also outline the forms of objects wished for. They are able to conduct themselves so intelligently in this, that the deaf-mute condition is not discovered till the second year, or even later, and then chiefly by their use of the eye, because in case of distant objects only those seen excite their attention.
From this behavior of infants born deaf it manifestly follows that even without the possibility of natural imitation of sounds, and without the knowledge of a single word, qualities may be blended with qualities into concepts. Thus, primitive thinking is not bound up with verbal language. It demands, however, a certain development of the cerebrum, probably a certain very considerable number of ganglionic cells in the cerebral cortex, that stand in firm organic connection with one another. The difference between an uninstructed young deaf-mute and a cretin is immense. The former can learn a great deal through instruction in speaking, the latter can not. This very ability to learn, in the child born deaf, is greater than in the normal child, in respect to pantomime and gesture. If a child with his hearing had to grow up among deaf-mutes, he would undoubtedly learn their language, and would in addition enjoy his own voice without being able to make use of it; but he would probably be discovered, further on, without testing his hearing, by the fact that he was not quite so complete a master of this gesture-language as the deaf-mutes, on account of the diversion of his attention by sound.
The total result of the foregoing observations concerning the capacity of accomplishment on the part of uneducated deaf-mutes in regard to the natural language of gesture and feature, demonstrates more plainly than any other fact whatever that, without words and without signs for words, thought-activity exists—that thinking takes place when both words and signs for words are wanting. Wherefore, then, should the logical combination of ideas in the human being born perfect begin only with the speaking of words or the learning to speak? Because the adult supposes that he no longer thinks without words, he easily draws the erroneous conclusion that no one, that not even he himself, could think before the knowledge of verbal language. In truth, however, it was not language that generated the intellect; it is the intellect that formerly invented language: and even now the new-born human being brings with him into the world far more intellect than talent for language.
FOOTNOTES:
[C] Empfindungsvorstellungen.