CHAPTER XIII 



SOME TERMS 



PSYCHOLOGICAL terms, derived from common 

 usage, have become more numerous than the 

 real distinctions they have to make, and are 

 used so loosely that they overlap each other. 

 A fitting vocabulary cannot be formed by mere 

 inductive studies. There is no certainty that 

 the distinctions are real unless they correspond 

 to the physiological facts that create or are 

 synchronous with the psychic manifestations. 

 Every mental fact has some physical expression. 

 The test, therefore, of the reality of a psychic 

 distinction is its correspondence to a physical 

 difference, and this test should be applied in 

 defining terms. 



Will and attention are often confused, as 

 when we say we will to give attention. Will- 

 ing is, however, rising katabolism innerva- 

 tion of the part aroused and a stronger flow of 



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