REDINTEGRATION IN ALBINO RAT— A STUDY IN RETENTION 3 



percentage of loss or gain, in explaining facts of retention 

 have been barren of results. From this it appears that a 

 new manner of approaching the problem along with some 

 determining factor for retention is necessary. When the 

 question is one in the learning of movement habit of some 

 sort the important consideration is movement, while all 

 else is subsidiary or of a secondary nature. This point has 

 certainly been overlooked in the past, and as a consequence 

 a confused mass of useless conclusions has accumulated. 

 It is the object of the present investigation to obtain 

 some definite results on retention. It may have been 

 readily gleaned years ago from experiments of long stand- 

 ing that the secret of retention may be found in the learn- 

 ing. Retention can be studied only by the effects learning 

 has produced in the organism. As a consequence the most 

 important thing is to compare the results obtained from 

 the learning with those of the retention tests. This con- 

 stitutes the primary factor to be considered. 



