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| | Kohler's Work on Insight Learning |
 | | Usually, after a period of unsuccessful jumping, the chimp apparently becomes angry or frustrated, walks away in seeming disgust, pauses, then looks at the food in what might be a more reflective way, then at the toys in the enclosure, then back at the food, and then at the toys again. |
 | | One chimp tried to shinny up a toppling pole it had poised under the bananas; several succeeded by stacking crates underneath, but were hampered by difficulties in getting their centers of gravity right. |
 | | The theme common to each of these attempts is that, to all appearances, the chimps were solving the problem by a kind of cognitive trial and error, as if they were experimenting in their minds before manipulating the tools. |
| www.pigeon.psy.tufts.edu /psych26/kohler.htm (672 words) |
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