35 



a type of behavior in a problem when given with others, 



that was not noticeable when one problem alone was given. 

 , The latch-box afforded an interesting comparison in 

 this respect. Many more Irandom movements and unique ways 

 in solving this problem were evident than when the 

 same problem was offered alone. Some rats would go to 

 the door, smell or touch the latch and go away, returning 

 later to raise the latch with their snouts. Other rats 

 would stand still before the door and move their heads 

 to-and-fro before making the decisive movement which 

 opened the door. At times there appeared to be a degree 

 of helplessness. Most of these obstacles to learning 

 were dropped suddenly and unexpectedly. Nothing very 

 significant in behavior was noticeable in the rats, when 

 in the maze, with the exception that fewer errors were 

 made; the greatest difficulty #as to obtain speed. Since 

 the inclined plane box was not taken alone, but only with 

 other problems, no comparison can be made of the movements. 



