ctation, beginning with 1 to 4 and ending on
the sixth day with 0 to 20.

It was obviously useless to continue the experiment further since Julius
had given up his attempts to locate the right box in the first choice
and was apparently satisfied to discover it by a process of trial and
error. He had, it would seem, satisfied himself that the problem was
insoluble. These results obtained in problem 1a constitute a most
interesting comment on the effects of problem 2 on the orang utan.
Behavior similar to that which he developed well might have been
obtained from a child of three to four years placed in a like situation
and forced to strive, day after day, to solve a problem beyond its
ideational capacity.

In many respects the most interesting and to the experimenter the most
surprising result of this long series of observations with Julius was
the lack of consistent improvement. It seemed almost incredible that he
should continue, day after day, to make incorrect choices in a
particular setting while choosing correctly in some other setting which
from the standpoint of the experimenter was not more difficult.

TABLE 10

Results for Orang utan in problem 1a

========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+===+===+===+========
| No. | S.1 | S.2 | S.3 | S.4 | S.5 | S.6 | S.7 | S.8 | S.9 | S.10 | | | | | Ratio
Date | of | | | | | | | | | | 1.2.3.4 | R | W | R | W | of
| trials | 5.63 | 1.2.3.4 | 6.7.8.9 | 2.3.4.5 | 3.4.5.6.7 | 1.2.3 | 5.6.7.8 | 1.2 | 2.3.4.5.6 | 5.6.7 | | | | | R to W
--------+-----------+--------------+--------------+--------------+--------------+--------------+--------------+--------------+--------------+--------------+--------------+---+---+---+---+--------
| | | | | | | | | | | | | | | |
August | | | | | | | |