Method of Regulation in Behavior and in Other Fields. 483 



responds, not by its first reaction, but by the final one. This is 

 illustrated for unicellular organisms by the case of Stentor, for 

 higher metazoa by the behavior of certain Crustacea, as described 

 by Yerkes ('02) and Spaulding ('04). There are certain differ- 

 ences between the two cases, but they are not essential for our 

 present purpose. 



How does this condition of affairs come about .f* As we have 

 set forth in previous papers ('04), the different methods of 

 reaction under the same external conditions must be due to 

 different physiological states of the organism. The " physiological 

 state" is evidently to be looked upon as a dynamic condition, not 

 as a static one; it is a certain way in which the bodily processes are 

 occurring; it tends directly to the production of some change. 

 In this respect the "law of dynamogenesis," propounded for ideas 

 of movement in man, applies to it (see Baldwin, '97, p. 167); 

 ideas must indeed be considered, so far as their objective accom- 

 paniments are concerned, as certain physiological states in higher 

 organisms. The changes toward which physiological states tend 

 are of two kinds. First, the physiological state, like the idea, 

 tends to produce movement. This movement often results in 

 such a change of condition as destroys the physiological state 

 producing it. But in case it does not, then the second tendency 

 of the physiological state shows itself. It tends to resolve itself 

 into another and different state. State i passes to state 2, and 

 this again to state 3. This tendency shows itself even when the 

 external conditions remain uniform. 



In this second tendency there manifests itself the important 

 law of which we have spoken above. When a certain physiolog- 

 ical state has been resolved, through the action of an external 

 agent, or otherwise, into a second physiological state, this resolu- 

 tion becomes easier, so that in the course of time it takes place 

 more quickly, and even spontaneously. 



This may be illustrated from the behavior of the unicellular 

 organism Stentor, as described in previous papers by the present 

 writer ('02 and '04), as follows: When the animal is stimulated 

 by the flood of carmin grains (or in any other way), this produces 

 immediately a certain physiological state corresponding to that 

 accompanying a sensation in ourselves. This state we may 

 designate A. It at first produces no reaction. As the carmin 

 continues or is repeated, this state A passes to a second state 



