although the subject was ignorant of that fact--the method being thus
similar to that adopted later for the final experiments of Group 2,
described above. Six types of tests were given, the order of
stimulation in the different types being _SSS, WWW, SSW, WWS, SWW_ and
_WSS_, the subject always knowing which order to expect. For each of
the six types one hundred tests were made on one subject and one
hundred and five on another, in sets of five tests of each type, the
sets being taken in varied order, so that possible contrast effect
should be avoided. The results were practically the same, however, in
whatever order the sets were taken, no contrast effect being
discernible.

The total number of judgments of _CT_, longer, equal, and shorter, is
given in Table VIII. The experiments on each subject consumed a number
of experiment hours, scattered through several weeks, but the relative
proportions of judgments on different days was in both cases similar
to the total proportions.


TABLE VIII.

_ST=CT=_ 3.0 SECS.

Subject _R_, 100. Subject _P_, 105.
L E S d L E S d
SSS 32 56 12 + 20 SSS 16 67 22 - 9
WWW 11 53 36 - 25 WWW 19 72 14 + 5
SSW 6 27 67 - 61 SSW 17 56 32 - 15
WWS 57 36 7 + 50 WWS 37 61 7 + 30
WSS 10 45 45 - 35 WSS 9 69 27 - 18