With regard to the question whether in this period, especially important for the development of the apparatus of speech, any articulate utterance of sound stands in firm association with an idea, I have observed the child under the most varied circumstances possible without disturbing him; but I have ascertained only one such case with certainty. The _atta_, _hoedda_, _hatta_, _hatai_, showed itself to be associated with the perception that something disappeared, for it was uttered when some one left the room, when the light was extinguished, and the like; also, to be sure, sometimes when such remarkable changes were not discoverable. Thus, the eleventh month ends without any other indubitable firm _association of articulation and idea_. In the next four weeks, up to the _end of the first year_ of life, there was no progress in this respect to record; but, from this time on, an eager desire--e. g., for a biscuit seen, but out of reach--was regularly announced by _ae-na_, _ae-nananana_, uttered loudly and with an expression of indescribable longing. The attempts at imitation, too, are somewhat more successful, especially the attention is more strained. When, e. g., in the fifty-first week, I sang something for the child, he gazed fixedly more than a minute, with immovable countenance, without winking, at my mouth, and then moved his own tongue. Correct repetition of a syllable pronounced to him is, however, very rare. When I laugh, and the child observes it, he laughs likewise, and then crows, with strong abdominal pressure. This same loud expression of joy is exhibited when the child unexpectedly sees his parents at a distance. This peculiar pressure, with strong expiration, is in general associated with feelings of pleasure. The child almost seems to delight in the discovery of his own abdominal pressure, when he produces by means of it the very high crowing sounds with the vowel _i_ or a genuine grunt. Of articulate sounds, syllables, and combinations, made without suggestion from others in the twelfth month, I have caught the following particularly with accuracy: _haja_, _jajajajaja_, _aja_, _njaja_, _nain-hopp_, _ha-a_, _pa-a_, _d[=e]waer_, _han-na_, _moemma_, _allda_, _alldai_, _apa-u-a_, _gaegae_, _ka_, _ladn_. Besides, the earlier _atta_ variously modified; no longer _dada_. More important than such almost meaningless sound-formations, among which, by the way, appears for the first time _w_ is the now awakened _ability to discriminate between words heard_. The child turns around when his name is spoken in a loud voice; he does this, it is true, at other loud sounds also, but then with a different expression. When he hears a new tone, a new noise, he is surprised, opens his eyes wide, and holds his mouth open, without moving.