Results in Series of Ten.  Avs. in Groups of 50. 
Series L. R. Time.  L. R. L. R. Time. 
Group I. 1 9 1 45 Per Cent.
2 3 7 69
3 9 1 20
4 4 6 72
5 10 31
—­ —­
35 15 70 30 47.4

II. 1   10        29
2   10        30
3   10        30
4   10        28.8
5   10        30.9
—­        ——­
50                         100          30
....                        .... 
III. 1    4   6     90     2
2    2   8     89.2   1
3    1   9     36.7   1
4    2   8     51     2
5    1   9     43     2
—­  —­           —­
10  40            7         20     80    62
....                        .... 
IV. 1    3   7    124     1
2    2   8     44     5
3    2   8     37     4
4       10     34
5    2   8            1
—­  —­           —­
9  41           11         18     82    60
....                        .... 
V. 1       10     44     2
2       10     35     4
3    3   7     76     3
4    2   8     50     7
5    1   9     50     4
—­  —­           —­
6  44           20         12     88    51
....                        .... 
VI. 1    2   8     45     2
2       10     41     5
3    1   9     41.8   7
4       10     32.7   7
5       10            8
—­  —­           —­
3  47           29          6     94    40
....                        .... 
VII. 1    1   9     39     4
2       10     38     7
3       10     30.7   3
4       10     42     6
5       10     48     4
—­  —­           —­
1  49           24          2     98    39.5

R. L.
....                           .... 
VIII. 1    8   2    147     1
2    9   1     26
3    8   2     49     2
4    9   1     38     2
5    9   1     41
—­  —­           —­
43   7            5         86     14    60.2
....                        .... 
IX.  1   1   9      41
2   2   8      39     1
3      10      29
4   1   9      47
5   1   9      32     1         10     90    38
—­  —­            —­
5  45             2

The dotted lines at the beginning of groups indicate the closed passage.

At the beginning of Group VIII. the Right instead of the Left passage was closed in order to test the ability of the animal to change its newly formed habit.  As a result of this change in the conditions the animal almost immediately began going to the Left.  What is most significant, however, is the fact that in the first trial after the change it was completely confused and spent over fifteen minutes wandering about, and trying to escape by the old way (Fig. 4 represents the path taken).  At the end of the preceding group the time of a trip was about 48 seconds, while for the first ten trips of Group VIII. the time increased to 147 seconds.  This remarkable increase is due almost entirely to the great length of time of the first trip, in which the animal thoroughly explored the whole of the box and made persistent efforts to get out by the Right passage as it had been accustomed to do.  It is at the same time noteworthy that the average time for the second series of Group VIII. is only 26 seconds.