The importance of motivation in learning has been widely recognized. However, due to its multidimensional and complex nature, it appears difficult to synthesize research findings on motivation across studies. Heated debates about the effects of intrinsic and extrinsic motivation on learning and their interaction have been going on since the terms…

Worldwide, the interest of policy-makers in participating in studies from the International Association for the Evaluation of Educational Achievement (IEA), such as Trends in International Mathematics and Science Study (TIMSS) has been growing rapidly over the past two decades. These studies offer the opportunity to relate the teaching and…

Changes in marriage and the family from 1950-74 in five nonsocialist countries were explored. The countries selected for the study were Japan, the Netherlands, West Germany, Sweden, and the United States. Most of the data were derived from the United Nations'"Demographic Yearbook," although various original sources from the particular…