reaction _bath--ink_ is 0.

Logically the combination _health--wealth_ may be placed in any
one of four classes, as follows:


/ intrinsic / causal dependence
health--wealth / \ coordination
\
\ extrinsic / speech reminiscence
\ sound similarity


But since our table shows this association to have an empirical value
of 7.6 per cent, it becomes immaterial which of its logical relations
is to be considered the strongest. It is mainly important, from our
point of view, to separate reactions possessing an empirical value
from those whose value is zero.



Sec. 6. AN EMPIRICAL PRINCIPLE OF NORMAL ASSOCIATION.


On a general survey of the whole mass of material which forms the
basis of the first part of this study, we are led to observe that
_the one tendency which appears to be almost universal among normal
persons is the tendency to give in response to any stimulus word one
or another of a small group of common reactions_.