Faktoren die samenhangen met studieduur 1976 : Onderzoek studievertraging

<p>Course of study / source of income / motivation for working / way of spending holidays / housing / problems with study / causes / individual circumstances and problems of the student. Background variables: basic characteristics/ education</p>修读课程、收入来源、工作动机、度假方式、住房状况、学业困扰、成因、学生个人境况与问题。背景变量（Background variables）：基本特征与教育背景。