HABIT FORMATION IN ALBINO RATS 



37 



tion was, on the average, 44.945 seconds; of the eighth genera- 

 tion, 13.825 seconds. All' the seventh generation had relearned 

 at the end of the twenty-fourth day; but ah the eighth genera- 

 tion had relearned at the end of the eighth day. The seventh 

 generation required, on the average, 8.00 days to relearn; the 

 eighth generation but 5.00 days. 



PUte EIII. 

 The Inclined Plane 



lalrrcd straits 

 MovmaL Control 



In these criteria of ability the seventh generation excelled in 

 learning, the eighth in absolute retention and relearning. But, 

 again, in absolute retention and relearning, we are dealing with 

 selected groups as the seven eighth generation and four seventh 

 generation rats that failed to learn were not used. There seems, 

 on the whole, to be but little difference between the abiHties of 



