Boris Sidis

“ Reproduction and recognition become easier, but it is questionable whether the baby like the intelligent dog, in recognizing the person, is aware of having recognized the person on previous occasions. The dog and the child are aware of the person and recognize him, but they are not aware of the series of preceding recognitions. A form of moment-consciousness with a series of isolated reproductions and recognitions, but with accumulated modifications may be termed the synthetic accumulative recognitive moment. ”

“ The series of states of the recognitive moment in the stage under consideration do, however, effect modifications in the order of their succession, a1 modifies a2, a2 modifies a3, a3 modifies a4, and so on each preceding state modifying the succeeding one.
The dog on seeing a person for the second or third time may recognize the friend of his master, but he does not remember that he has recognized him already on previous occasions. Similarly when the baby sees a strange person for the first'time, it may become scared and begin to cry. ”

“ Subsequent repetition of similar experiences may reduce or on the contrary may increase the fear element, but the baby learns to know and recognize his man and the psycho-physiological and psycho-motor reactions follow as soon as the "man" is caught sight of. ”