The test was continued on August 24 when, instead of a carrot, a half
banana was used as bait. It was placed only five feet from the floor,
and three boxes were as formerly placed in distant corners of the cage.
When admitted, Skirrl looked at the banana, then pulled one of the boxes
toward it, but instead of mounting, he went to the smallest box and
began to gnaw it. Shortly, he mounted the middle sized box and looked up
toward the banana, but the box was not directly under the bait, and in
any event, it would have been impossible for him to reach it. He next
went to the largest box, gnawed it vigorously, turned it over several
times, and then abandoned it for the middle sized box, from which by
skillful use of his teeth and hands, he quickly tore off one side.
By this time, apparently without very definitely directed effort on the
part of the monkey, all three of the boxes were in the center of the
cage and almost directly beneath the banana. Skirrl climbed up on the
largest box and made efforts to pull the middle sized one up on to it,
the while looking at the banana every few seconds. He did not succeed in
getting the boxes properly placed, and after a time began moving them
about restlessly.
His behavior plainly indicated that hunger was not his chief motive. He
was more interested in playing with things or in working with them than
in eating, and the satisfaction of tearing a box to pieces seemed even
greater than that of food. It is especially noteworthy that when Skirrl
attempts to dismember a box, instead of starting at random, he searches
carefully for a favorable starting point, a place where a board is
slightly loosened or where a slight crack or hole enables him to insert
his hand or use his teeth effectively. Many times during this experiment
he was observed to examine the boxes on all sides in search of some weak
point. If no such weak point were found, he shortly left the box; but if
he did find a favorable spot, he usually succeeded, before he gave up
the attempt, in doing considerable damage to the box.
Following the behavior described above, Skirrl returned to the middle
sized box, placed it on end under the banana, mounted, and looked upward
at the bait, but as it was a few inches beyond his reach, he made no
attempt to get it, but instead, after a few seconds, went to the
smallest box, and finding a weak point, began to tear it to pieces.
Later he rolled what was left of the smallest box close to the other two
boxes, nearly under the banana, and the remainder of his time was spent
gnawing at the boxes and playing with pieces which he had succeeded in
tearing from them. During the remainder of the thirty minute interval of
observation, no further attention was given the bait.
Public-domain text, read in full here on John Shaqi.
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