CONTENTS Page 



Introduction 1 



Apparatus and Method for Maze 4 



Experimental Results: 



I. Learning 11 



II. Redintegration: 



(1) Dominant " Error " 16 



(2) Effect of Distribution of Trials 25 



(3) Redintegration After a 30- Day Retention Period: 



(a) Retention Period for \the Maze 32 



(b) Influence of Learning a New Problem During the Reten- 



tion Period 34 



(c) Influence of Incomplete Learning 38 



(4) Influence of Previous Training at 45-Day Retention Period 43 



(5) Inclined Plane Problem 48 



III. Individual Differences 61 



Conclusions 64 



Bibliography. 66 



