These different acts, pecking at a door, jumping up and with the neck pulling down a string, stepping on a platform, and pecking at a tack, were the ones which various chicks were given a chance to imitate. The chicks used were from 16 to 30 days old. The method of experiment was to put a chick in, leave him 60 to 80 seconds, then put in another who knew the act, and on his performing it, to let both escape. No cases were counted unless the imitator apparently saw the other do the thing. After about ten such chances to learn the act, the imitator was left in alone for ten minutes. The following table gives the results. The imitators, of course, had previously failed to form the association of themselves. F denotes failure to perform the act: TABLE 4 ======+=====+=========+============+============== | |NO. TIMES| TIME IN | CHICK | ACT | SAW |WHICH FAILED| FINAL TIME ------+-----+---------+------------+-------------- 84 | V | 38 | 45.00 F | 15.00 F 85 | V | 30 | 30.00 F | 10.00 F 86 | V | 44 | 55.00 F | 15.00 F 87 | V | 26 | 35.00 F | 15.00 F 80 | W | 54 | 60.00 F | 15.00 F 81 | W | 40 | 45.00 F | 15.00 F 87 | W | 27 | 30.00 F | 10.00 F 81 | X | 18 | 20.00 F | 10.00 F 82 | X | 21 | 20.00 F | 8.40 _Did_ 83 | X | 33 | 35.00 F | 15.00 F 84 | X | 46 | 55.00 F | 15.00 F 84 | Y | 45 | 55.00 F | 15.00 F 83 | Y | 29 | 35.00 F | 15.00 F ======+=====+=========+============+============== Thus out of all these cases only one did the act in spite of the ample chance for imitation. I have no hesitation in declaring 82’s act in stepping on the platform the result of mere accident, and am sure that any one who had watched the experiments would agree. IMITATION IN CATS