KINAESTHETIC PROCESSES IN THE WHITE RAT 13 



poral maze. Various expedients had to be used in an effort to 

 break up this stereotyped form of response. The rats were 

 forced constantly through the left side of the maze; or they were 

 taken out of the apparatus and fed between each of the ten 

 choices; or they were given several days rest. These methods 

 succeeded only with rat 110, and this animal mastered the prob- 

 lem in the manner to be described below. 



The animals who succeeded only in building up a right posi- 

 tion habit were tested with the end-stop so arranged that an 

 open pathway existed only around the right side of the apparatus. 

 When this was done the rats either ran all of the ten choices to 

 the right in conformity with their position habit, or once or twice 

 made left turns. So when the apparatus was arranged to per- 



TABLE 5 

 Number of trials given on temporal maze, simple alternation 



mit only free runs to the left, the animals made either all wrong 

 choices or occasionally interspersed a turn to the left. The evi- 

 dence indicates, therefore, that this position habit is practically 

 uninfluenced by entrance- and end-stops. The behavior is un- 

 doubtedly a chain of reflexes whose stimuli are internal. This 

 is further supported by the fact that when the rats were inserted 

 with end-stop and entrance-stop removed so that a continuous 

 path was open to the animal, each ran at least 80 per cent of its 

 choices around the right side of the box. Here where no stops 

 were used, there was much retracing about the box, but each time 

 the rat ran through the central alley in the normal direction, it 

 turned to the right. Reliance was therefore placed upon the 

 entrance-stop as a cue for guiding the animal into the central 



