Animal
1. Julius, _Pongo pygmaeus_: Box stacking experiment Box and pole experiment Draw-in experiment Lock and key test 2. Skirrl, _Pithecus irus_: Box stacking experiment Box and pole experiment Draw-in experiment Hammer and nail test Other activities 3. Sobke, _Pithecus rhesus_: B...
1. Julius, _Pongo pygmaeus_: Box stacking experiment Box and pole experiment Draw-in experiment Lock and key test 2. Skirrl, _Pithecus irus_: Box stacking experiment Box and pol...
2. Chapter 2It will be necessary at various points in later descriptions to refer to these several figures. But further description of them will be more readily appreciated after a careful...
3. Chapter 3Taking the first line of table 1 below the explanatory headings, we note on April 19 ten trials, numbered 1 to 10, were given to Skirrl. In trial 1, with setting 1, he chose cor...
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5. Chapter 5The method of choosing the first box at the right end and then the one next to it developed in the case of all except two of the ten settings. The time of appearance is worth no...
6. Chapter 6========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+==...
7. Chapter 7========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+==...
8. Chapter 8========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+==...
9. Chapter 9From this time on until the end of my work, Sobke was always savage and both in and out of the apparatus he was constantly on the watch for an opportunity to spring upon me. Pre...
10. Chapter 10It is also noteworthy that Julius in the presence of visitors or under other unusual conditions worked steadily and well, whereas the monkeys, and especially Sobke, tended to be...
11. Chapter 11" 22 (2nd series). No punishment; allowed to Food for each trial enter boxes until right one was found " 23 .............. Return to starting point. After five wrong choices of...
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13. Chapter 13After two hundred and fifty trials on problem 2 had been given Julius, it seemed desirable to introduce a radical change in method in order to stimulate him to maximal effort. I...
14. Chapter 14From my notes I quote the following comment on the results of the initial experiment: "Despite all that has been written concerning the intelligent behavior of the orang utan, I...
15. Chapter 15His next move was to go to the opposite end of the box, look in, take the piece of banana which was near the opening, then pick up the second pole, which had not previously been...
16. Chapter 16The first observations on Sobke were made on June 14. The three boxes had been placed in the form of a pyramid directly under the banana, which hung about eighteen inches above...
17. Chapter 17One morning as I was watching the behavior of the animals in the several cages, I noticed Tiny dressing with her teeth a wounded finger. It had evidently been bitten by one of t...
18. Chapter 18I have attempted to indicate briefly the historical setting of my investigation. I propose, now, in the concluding section, to look forward from this initial research and to ind...
19. Chapter 19An institute established on such a modest basis as this still might render largely important scientific service through its own research and through organized cooperation with o...