Problem 1. First Mechanism at Left of Group
Doors No. of No. of
Settings open doors open right door
1………………1.2.3………………….3………………1
2………………8.9……………………2………………8
3………………3.4.5.6.7………………5………………3
4………………7.8.9………………….3………………7
5………………2.3.4.5.6………………5………………2
6………………6.7.8………………….3………………6
7………………5.6.7………………….3………………5
8………………4.5.6.7.8………………5………………4
9………………7.8.9………………….3………………7
10………………1.2.3………………….3………………1
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Total 35
PROBLEM 2. Second mechanism from the right end of group
Doors No. of No. of
Settings open doors open right door
1………………7.8.9………………….3………………8
2………………1.2.3.4………………..4………………3
3………………2.3.4.5.6.7…………….6………………6
4………………1.2.3.4.5.6…………….6………………5
5………………4.5.6.7.8………………5………………7
6………………1.2.3………………….3………………2
7………………2.3.4.5………………..4………………4
8………………1.2.3.4.5.6.7.8.9……….9………………8
9………………1.2.3.4………………..4………………3
10………………3.4.5.6.7.8…………….6………………7
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Total 50
PROBLEM 3. Alternately the first mechanism at the left and the
first at the right end of the group
Doors No. of No. of
Settings open doors open right door
1………………5.6.7………………….3………………5
2………………5.6.7………………….3………………7
3………………1.2.3.4.5.6…………….6………………1
4………………1.2.3.4.5.6…………….6………………6
5………………4.5.6.7.8………………5………………4
6………………4.5.6.7.8………………5………………8
7………………2.3.4.5………………..4………………2
8………………2.3.4.5………………..4………………5
9………………3.4.5.6.7.8.9…………..7………………3
10………………3.4.5.6.7.8.9…………..7………………9
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Total 50
PROBLEM 4. Middle mechanism of the group
Doors No. of No. of
Settings open doors open right door
1………………2.3.4………………….3………………3
2………………5.6.7.8.9………………5………………7
3………………1.2.3.4.5.6.7…………..7………………4
4………………7.8.9………………….3………………8
5………………4.5.6.7.8………………5………………6
6………………1.2.3.4.5.6.7.8.9……….9………………5
7………………1.2.3………………….3………………2
8………………2.3.4.5.6………………5………………4
9………………3.4.5.6.7.8.9…………..7………………6
10………………6.7.8………………….3………………7
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Total 50
It was found desirable after a problem had been solved to present a new and radically different series of settings in order to determine to what extent the subject had learned to choose the correct door by memorizing each particular setting. These supplementary observations may be known as control experiments, and the settings as supplementary settings. In case of these, as for the original settings, the essential facts are presented in tabular arrangement.