| Ratio of Interval B to Interval A. | Rate: 2.5 secs. | Rate: 2.2 secs. | Rate: 1.8 secs. | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| B | A | B | A | B | A | |||||||||||||
| + | = | - | + | = | - | + | = | - | + | = | - | + | = | - | + | = | - | |
| 1.000 : 1.000 | 2 | 8 | 0 | 0 | 8 | 2 | 0 | 8 | 2 | 0 | 2 | 8 | 0 | 4 | 0 | 0 | 2 | 2 |
| 0.917 : 1.000 | 0 | 8 | 2 | 4 | 6 | 0 | 3 | 8 | 0 | 0 | 8 | 3 | 2 | 2 | 0 | 0 | 2 | 2 |
| 0.846 : 1.000 | 1 | 9 | 0 | 5 | 4 | 1 | 3 | 8 | 0 | 3 | 7 | 1 | 6 | 5 | 0 | 1 | 8 | 2 |
| 0.786 : 1.000 | 1 | 10 | 0 | 11 | 0 | 0 | 6 | 6 | 0 | 7 | 3 | 4 | 6 | 2 | 2 | 2 | 6 | 2 |
| 0.733 : 1.000 | 4 | 2 | 0 | 4 | 0 | 2 | 4 | 6 | 0 | 8 | 0 | 2 | ||||||
| 0.687 : 1.000 | 5 | 3 | 1 | 6 | 1 | 2 | 2 | 6 | 0 | 7 | 0 | 1 | ||||||
| Totals | 4 | 35 | 2 | 20 | 18 | 3 | 21 | 35 | 3 | 20 | 21 | 20 | 20 | 25 | 2 | 18 | 18 | 11 |
These results are converted into percentages of the total number of judgments in the following table:
TABLE XXXIII.
| Rate of Success. | B | A | |||||||
|---|---|---|---|---|---|---|---|---|---|
| + | = | - | Errors. | + | = | - | Errors. | ||
| 2.5 | secs | 10 | 85 | 5 | 15 | 49 | 44 | 7 | 51 |
| 2.2 | " | 36 | 59 | 5 | 41 | 33 | 34 | 33 | 67 |
| 1.8 | " | 43 | 53 | 4 | 47 | 38 | 38 | 24 | 62 |
In the case of interval A the direction of the curve of error changes in passing from Rate II. to Rate III. In the case of interval B the increase is continuous.
This increase in the percentage of error is, further, distinctly in the direction of an accentuation of the overestimation of the interval B, as is shown in the percentage of cases in which this interval appeared greater than the rest of the series for each of the three rates.
If the three rates be combined in the one set of results, the difference in the effects produced on the interval following the louder sound and on that which precedes it becomes again apparent. This is done in the table below.
TABLE XXXIV.
| Ratio | B | A | B | A | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| + | = | - | + | = | - | T.E. | T.J. | % | T.E. | T.J. | % | |
| I. | 2 | 20 | 2 | 0 | 12 | 12 | 2 | 24 | 8.5 | 12 | 24 | 50.0 |
| II. | 5 | 18 | 2 | 4 | 16 | 5 | 5 | 25 | 20.0 | 21 | 25 | 84.4 |
| III. | 10 | 22 | 0 | 9 | 19 | 4 | 10 | 32 | 31.0 | 23 | 32 | 72.0 |
| IV. | 13 | 18 | 2 | 20 | 9 | 8 | 13 | 33 | 39.0 | 17 | 37 | 46.0 |
| V. | 8 | 8 | 0 | 12 | 0 | 4 | 8 | 16 | 50.0 | 4 | 16 | 25.0 |
| VI. | 7 | 9 | 1 | 13 | 1 | 3 | 7 | 17 | 41.0 | 4 | 17 | 24.0 |
The overestimation of the interval before the louder sound also tends to increase in extent with the actual increase in duration of the interval following that sound over the other intervals of the series.