learning vocabulary constitutes a crucial step in language learning. amongst different word categories, compound words have failed to attract the attention they deserve. this led us to conduct a study trying to pinpoint the difficulties learning these words and to suggest some techniques facilitating their acquisition. to that effect, a questionnaire as well as a vocabu-lary test were given to ...

In this paper, I formally deene uncertainty, diiculty, and complexity both as measures of problems and environments and as analytic paradigms and discuss the importance of the diiculty and uncertainty paradigms in the study of institutions.