the right box was indicated to the animal by the
slight and momentary raising of its exit door. Of course no records of
the choices for this group of one hundred trials appear in table 9, for
the simple reason that the animal inevitably and immediately entered the
right box. It was thought that this method might serve to break up the
previously developed tendencies toward inadequate forms of response and
so encourage the animal that he would later solve the problem when given
opportunity to select the right box without aid from the experimenter.
But as a matter of fact, while the ratio of right to wrong first choices
was 1 to .67 in the series preceding this change of method, it was 1 to
1.50 in the first series following its use. There is no satisfactory
evidence that Julius profited by this experience, though as a matter of
fact he did succeed in making his best daily record, eight right to two
wrong choices, on August 4, after 1190 trials.

The curve of learning for this problem has been plotted and is presented
in figure 19. It is of course incomplete and it is offered only to
indicate the extreme irregularity in performance.

_Problem 1a. First at the Right End_

It was decided on August 19 that the further continuation of the work of
Julius on problem 2 was not worth while. He had become much discouraged,
and although willing to work for food, gave no indications whatever of
improvement and seemed to have exhausted his methods. It seemed wise
instead of giving up work with him in the multiple-choice method to
return to a form of problem 1. We may designate it as problem 1a. The
right box is definable as the first at the right end of the series
instead of the first at the left end as in the original problem 1. It
was thought possible that Julius might quickly solve this problem by a
process similar to that used for problem 1.

Work was begun on problem 1a, August 20, and for six successive days two
series of trials per day were given, the settings for which as well as
the resulting choices are given in table 10. Most notable in these
results is the large number of cases in which Julius chose first the
second box from the right end of the series, or in other words that box
which had been the right one in problem 2. Contrary to expectation, he
showed no inclination to abandon this tendency to choose the second from
the right end, and the ratio of right to wrong choices changed in the
direction opposite from expe