PERSEVERANCE REACTIONS IN PRIMATES AND RODENTS 25 



TABLE 5 



Average number of C-reactions per 100 trials 

 Group 



Girls (incomplete records excluded) 10. 77 



Girls (feeble minded cases excluded) 9 . 93 



Baboon and Monkeys 4 . 80 



(atypical Monkeys 5 and 26 excluded) 7. 33 



Mouse 7.00 



Gray Rats 1 . 00 



Black Rats 3. 50 



White Rats 4.88 



Gophers 1 . 40 



Type D Reactions. — This is a form of discontinuous repetition 

 of a non-adaptive direction of activity which enters into the 

 typical perseverance reactions of animals and even of human 

 adults in the presence of difficult and unusual or highly exciting 

 situations. At this point it will be found convenient to examine 

 the individual records of D-reactions in table 2 and the group 

 averages in table 6: 



TABLE 6 



Average number of D-reactions per 100 trials 

 Group 



Girls (incomplete records excluded) 6. 82 



Girls (feeble-minded cases excluded) ' 7. 71 



Baboon and Monkeys 8 . 80 



(atypical Monkeys 5 and 26 excluded) 7. 67 



Mouse 5. 00 



Gray Rats 6. 20 



Black Rats 6.50 



White Rats 8. 13 



Gophers 4.40 



Since the records of D-reactions are not easily interpreted 

 without constant reference to those of the E-reactions, both 

 types will be discussed together, and table 7 will follow 

 directly : 



