X FOREWORD 



This monograph is the record of what happened in Montevideo and 

 has been put together with the help of the consuking editors. May I thank 

 all three but especially Dr Fessard who, being on the spot, has advised me 

 on many points. 



It is the hope of all who contributed to this book that it will be of value 

 to all those who study the fundamental processes of learning, wherever 

 they may be. 



J. F. Delafresnaye 



