The Principles of Psychology, Volume 2 (of 2)James, William
Science
The Principles of Psychology, Volume 2 (of 2)
James, William
Psychology
In these ambiguous cases it is interesting to note that perception is
rarely abortive; _some_ perception takes place. The two discrepant sets
of associates do not neutralize each other or mix and make a blur. What
we more commonly get is first one object in its completeness, and then
the other in its completeness. In other words, _all brain-processes
are such as give rise to what we may call_ FIGURED _consciousness_. If
paths are irradiated at all, they are irradiated in consistent systems,
and occasion thoughts of definite objects, not mere hodge-podges of
elements. Even where the brain's functions are half thrown out of gear,
as in aphasia or dropping asleep, this law of figured consciousness
holds good. A person who suddenly gets sleepy whilst reading aloud will
read wrong; but instead of emitting a mere broth of syllables, he will
make such mistakes as to read 'supper-time' instead of 'sovereign,'
'overthrow' instead of 'opposite,' or indeed utter entirely imaginary
phrases, composed of several definite words, instead of phrases of the
book. So in aphasia: where the disease is mild the patient's mistakes
consist in using entire wrong words instead of right ones. Only in
the gravest lesions does he become quite inarticulate. These facts
show how subtle is the associative link; how delicate yet how strong
that connection among brain-paths which makes any number of them, once
excited together, thereafter tend to vibrate as a systematic whole. A
small group of elements, '_this_,' common to two systems, A and B, may
touch off A or B according as accident decides the next step (see Fig.
47). If it happen that a single point leading from '_this_' to B is
momentarily a little more pervious than any leading from '_this_' to A,
then that little advantage will upset the equilibrium in favor of the
entire system B. The currents will sweep first through that point and
thence into all the paths of B, each increment of advance making A more
and more impossible. The thoughts correlated with A and B, in such a
case, will have objects different, though similar. The similarity will,
however, consist in some very limited feature if the 'this' be small.
[Illustration: FIG. 47.]
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