No doubt this behavior varies in individual cases, inasmuch as in some few the imitative articulation may be to some extent earlier developed than the understanding. There are many children who even in their first year have a monkey-like knack at imitation and repeat all sorts of things like parrots without guessing the sense of them. Here, however, it is to be borne in mind that such an echo-speech appears only after the _first_ understanding of some spoken word can be demonstrated; in no case before the fourth month. Lindner relates that when he one day observed that his child of eighteen weeks was gazing at the swinging pendulum of the house-clock, he went with him to it, saying, "Tick-tack," in time with the pendulum; and when he afterward called out to the child, who was no longer looking at the clock, "Tick-tack!" this call was answered, at first with delay, a little later immediately, by a turning of the look toward the clock. This proved that there was understanding long before the first imitation of words. Progress now became pretty rapid, so that at the end of the seventh month the questions, "Where is your eye? ear? head? mouth? nose? the table? chair? sofa?" were answered correctly by movements of hand and eyes. In the tenth month this child for the first time himself used a word as a means of effecting an understanding, viz., _mama_ (soon afterward, indeed, he called both parents _papa_). The child's inability to repeat distinctly syllables spoken for him is not to be attributed, shortly before the time at which he succeeds in doing it, to a purely psychical adynamy (impotence), not, as many suppose, to "being stupid," or to a weakness of will without organic imperfections determined by the cerebral development, for the efforts, the attention, and the ability to repeat incorrectly, show that the will is not wanting. Since also the peripheral impressive acoustic and expressive phonetic paths are intact and developed, as is proved by the acuteness of the hearing and the spontaneous formation of the very syllables desired, the cause of the inability to repeat correctly must be solely organic-centro-motor. The connecting paths between the sound-center and the syllable-center, and of both these with the speech motorium, are not yet or not easily passable; but the imitation of a single sound, be it only _a_, can not take place without the mediation of the cerebral cortex. Thus in the very first attempt to repeat something heard there exists an unquestionable advance in brain development; and the first successful attempt of this kind proves not merely the augmented functional ability of the articulatory apparatus and of the sound-center, and the practicability of the impressive paths that lead from the ear to the sound-center--it proves, above all, the establishment of intercentral routes that lead from the sound-center and the syllable-center to the motorium.