3. That the 'constant error' of time judgment is dependent
upon the intensity of the stimulations employed, although the
three stimulations limiting the two intervals remain of equal
intensity.

To harmonize these results we have found it necessary to assume:

1. That the length of a time interval is perceived as the
amount of change in the sensation-complex corresponding to
that interval.

2. That the so-called 'constant error' of time estimation is
determined by two mutually opposing factors, of which the
first is the _loss of time_ occasioned by the change of
attitude at the division between the two intervals, and the
second is the diminishing effect of _perspective_.

It is evident, however, that this last assumption applies only
to the conditions under which the results were obtained,
namely, the comparison of two intervals marked off by three
brief stimulations.

* * * * *




PERCEPTION OF NUMBER THROUGH TOUCH.