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The Mental Life of Monkeys and Apes

by Robert Mearns Yerkes

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Table 3

Results for Skirrl, P. irus, in Problem 3

========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+===+===+===+======== Date | No. of | S.1 | S.2 | S.3 | S.4 | S.5 | S.6 | S.7 | S.8 | S.9 | S.10 | R | W | R | W |Ratio of | trials | 5.6.7 | 5.6.7 | 1.2.3.4.5.6 | 1.2.3.4.5.6 | 4.5.6.7.8 | 4.5.6.7.8 | 2.3.4.5 | 2.3.4.5 | 3.4.5.6.7.8.9| 3.4.5.6.7.8.9| | | | |R to W ________|___________|______________|______________|______________|______________|______________|______________|______________|______________|______________|______________|___|___|___|___|________ August | | | | | | | | | | | | | | | | | | | | {6.5.4.6 | | | | | | | {8.7.6.5 | | | | | 19 | 1- 10 | 7.5 | 6.7 | {3.2.6.4 | 5.3.6 | {7.8.7.6 | 8 | 4.3.5.4.5.2 | 5 | 9.8.7.6.4.3 | {4.5.8.7 | 2 | 8 | 2 | 8 | 1:4.00 | | | | {3.6.1* | | {8.6.4 | | | | | {6.5.9* | | | | | | | | | | | | | | | | | | | | | | | | | {5.4.6.5 | | {8.7.6.7 | | | | | | | | | | 20 | 11- 20 | 7.6.5 | {6.5.6.5 | {4.6.5.3 | 5.3.2.4.6 | {7.5.8.8 | 8 | 5.4.3.2 | 4.5 | 8.7.6.5.4.3 | {8.7.6.8.3 | 1 | 9 | 1 | 9 | 1:9.00 | | | {7 | {2.5.1* | | {7.6.4* | | | | | {7.6.4.3.9 | | | | | | | | | | | | | | | | | | | | | | | | | {6.2.5.6 | | | | {5.3.5.4 | | | | | | | | 21 | 21- 30 | 7.6.7.6.5 | 7 | {5.3.6.5 | 2.5.5.6 | 8.6.5.4 | 8 | {3.5.3.5 | 5 | {9.8.7.6 | 8.9 | 3 | 7 | 3 | 7 | 1:2.33 | | | | {4.3.1* | | | | {4.3.2* | | {5.4.3 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 23 | 31- 40 | 7.6.5 | 6.5.7 | {6.4.3.2 | 3.2.6 | 8.7.6.4 | 8 | 5.4.5.3.2 | 5.2 | 8.7.3 | 9 | 2 | 8 | 2 | 8 | 1:4.00 | | | | {5.6.2.1 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 24 | 41- 50 | 7.6.5 | 7 | {6.2.5 | 6 | {8.7.8.7 | 8 | 5.3.2 | 5 | {9.8.7.6 | 9 | 5 | 5 | 5 | 5 | 1:1.00 | | | | {4.3.1 | | {5.7.5.4 | | | | {5.4.3 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | {8.7.3.6 | | | | | 25 | 51- 60 | 7.6.5 | 6.5.7 | 5.2.1 | 6 | 8.5.4 | 8 | 2 | 2.5 | 9.8.7.4.3 | {8.7.5.3 | 3 | 7 | 3 | 7 | 1:2.33 | | | | | | | | | | | {8.7.9* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 26 | 61- 70 | 7.6.5 | 6.5.7 | 1 | 2.1.6 | 8.7.6.4 | 8 | 2 | 3.2.5 | 9.8.7.5.3 | {3.6.8.3 | 3 | 7 | 3 | 7 | 1:2.33 | | | | | | | | | | | {4.7.9 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | {8.6.3.3 | | | | | 27 | 71- 80 | 7.6.5 | 7 | 2.1 | 1.5.6 | 8.7.6.4 | 8 | 2 | 5 | 9.8.7.6.3 | {7.5.3.8 | 4 | 6 | 4 | 6 | 1:1.50 | | | | | | | | | | | {3.6.9* | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 28 | 81- 90 | 7.6.7.5 | 7 | 3.1 | 6 | 8.6.4 | 4.8 | 2 | 2.4.5 | 8.7.4.3 | 3.8.9 | 3 | 7 | 3 | 7 | 1:2.33 | | | | | | | | | | | | | | | | ========+===========+==============+==============+==============+==============+==============+==============+==============+==============+==============+==============+===+===+===+===+========

[Footnote *: Aided by experimenter.]

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