Subject _Mm._ Subject _A._ Subject _D._

S E L d S E L d S E L d
SSS 24 13 13 - 11 7 30 13 + 6 10 31 9 - 1
WSS 33 9 8 - 25 20 24 6 - 14 17 27 6 - 11
SSW 19 15 16 - 3 23 16 11 - 12 10 31 9* - 1
WWW 19 12 19 0 13 26 11 - 2 1 40 9 + 8
SWW 18 30 2 - 16 23 21 6* - 17 7 38 5 - 2
WWS 13 16 21 + 8 12 30 8 - 4 15 25 10 - 5

*Transcriber's Note: Original "16" changed to "6", "19" to "9".


Analysis of this table shows that in every case a difference between
the intensities of the first and second taps lengthens the first
interval in comparative estimation. In the case of subject _Mm_ a
difference in the intensities of the second and third taps lengthens
the second interval subjectively. But in the cases of the other two
subjects the difference shortens the interval in varying degrees.

The intensity difference established for the purposes of these
experiments was not great, being less than that established for the
work on the first two subjects, and therefore the fact that these
results are less decided than those of the first work was not
unexpected. The results are, however, very clear, and show that the
lengthening effect of a difference in intensity of the stimulations
limiting an interval has its general application only to the first
interval, being sometimes reversed in the second. From the combined
results we find, further, that a uniform change in the intensity of