338 D. I. MACHT, S. ISAACS AND J. GREENBERG 



SUMMARY 



1. All the antipyretics with the possible exception of quinin 

 tend to impair or retard the psychological reaction time. 



2. The simple reactions to sound, light, and touch, if anything 

 are more affected than the more complex or association reaction 

 times. 



3. Combinations of antipyretics give results explainable by 

 simple addition of the effects of the components. 



4. The greater change in the simple reactions as compared with 

 the more complex ones seems to point to the seat of action of the 

 antipyretic analgesics as being on some lower synapse than that 

 which is affected by morphin or opium. 



REFERENCES 



(1) MACHT AND ISAACS: Psychobiology, 1917, i, 19. 



(2) MUNSTERBERG: Beitrage zur Exp. Psych., 1892, iv, 121-146. 



(3) DTTNLAP: Journal Exp. Psych., 1917, ii, June. 



(4) DUNLAP: Psychological Review, 1913, xx, 154. 



