BEHAVIOR OF THE COMMON ROACH. 36! 



and roaches jumping from the maze to the top of a nearby bottle. 

 Yet I could bring a pencil lo within a centimeter of the head of a 

 roach without causing a response unless I touched one of the 

 antennae. 



CONCLUSIONS. 



1. By arranging the trials at intervals of half an hour, a roach 

 may be taught, within a day, to run the maze. 



2. The gradual manner in which it eliminates its errors would 

 cause one to say the roach learns to run the maze by the trial 

 and error method; yet, in so doing, it utilizes sense stimuli. 

 This is evidenced by the careful manner in which it examines 

 (often over and over again) the corners and edges of the maze 

 and the space adjacent thereto. 



3. At times the roach acts as though experiencing the emotion 

 the psychologists call will. 



4. Although the effects of training persist for a long time, yet 

 the memory of the roach is poor; for after an interval of twelve 

 hours marked lapses were noticed. 



5. In its toilet-making activities the behavior of the roach 

 resembles very much the toilet-making activities of the cat. 



6. In their behavior on the maze roaches display marked 

 individuality. 



