250 Animal Intelligence 
nature or previous experience, may connect with whatever 
response is bound to some situation much like it, — and (2) 
by the law of partial activity —that more or less of the 
total situation may be specially active in determining the 
response. 
The first of these laws is a result of the facts that conduc- 
tion in the neurones follows the line of least resistance or 
closest connection, that the action-system is so organized 
that certain responses tend to be made in their totality if 
at all, and that slightly different situations may, therefore, 
produce some one response, the effects of their differences 
being in the accessories of that response. 
The second law is a result of the facts that the situation, 
itself a compound, produces a compound action in the neu- 
rones, and that by reason of inner conditions, conditions, the-relative 
Sritenntties OF GINERERE pats of the cempound may vary. 
"The—commonest response will be be that due-to the modal. 
condition of the neural compound, but every condition 
of the compound will have its ‘Tesponse. 
Tue ADEQUACY OF THE LAWS OF EXERCISE AND 
EFFECT 
Behavior has been supposed to be modified in accordance 
with three other principles or laws besides the law of exercise 
and the law of effect. Imitation is often used as a name 
for the supposed law thatthe perception of a certain re- 
sponse to a situation by another animal tends in and of it- 
self to connect that response to that situation. Common 
acceptance has been given to more or less of the law that 
the idea of an act, or of the result of an act, or of the im- 
mediate or remote sensations produced by the act, tends 
in and of itself to produce the act. Such a law of ‘sugges- 
