1 2 3 4 Subject Shapes (a) 94% 38% 18% 31% A Colors (b) 5 61 20 59 Letters and (c) Numerals 0 0 61 9 Subject (a) 48 39 21 33 B (b) 43 60 29 38 (c) 8 0 51 28 Subject (a) 88 15 26 34 C (b) 8 77 28 8 (c) 5 7 47 58 Subject (a) 60 13 11 40 D (b) 19 67 2 37 (c) 19 19 86 23 Subject (a) 51 15 0 37 E (b) 22 56 8 29 (c) 26 28 91 34 Subject (a) 66 12 0 50 F (b) 14 77 0 27 (c) 19 10 100 23 Subject (a) 43 21 7 24 H (b) 29 52 4 19 (c) 27 26 88 57 The most interesting part of this division of the experiment is brought out in Table II in answer to the problem, "Will the place of voluntary attention materially alter the distribution of judgments of the highest order of certainty among the given groups?" In every case the percentage is affected, in most cases, greatly affected. Take the case of subject A, for instance. Although, when his attention is equally distributed over the field 59% of the judgments we consider were of colors, yet when his attention was fixed on shapes and on letters and numerals this fell to 5% and 20% respectively. When it was fixed on colors, it rose, indeed, only to 61%. When, however, subject A fixed his attention upon the letters and numerals, 61% of the judgments were confined to the group attended to,--the same percentage as when colors were the attended-to group,--although, when his attention was distributed over the whole field, the percentage of these judgments about the group of letters and numerals was 9% only. When shapes were attended to, the 31% of the fourth phase of the experiment rose to 94%,--almost all of the judgments of the highest grade of certainty that were given were judgments about shapes. A similar study of the results given in the table can be made for the other subjects. The degree of change varies with the subject and with the group, but always there is some change, and often a very marked one. In this experiment the place of voluntary attention clearly did alter, and alter materially, the proportion of judgments of the highest order of certainty made about any given group.