Knowledge space theory is a scientific method for studying educational principles,and it yields a series of research findings.This paper is intended to comprehensively review the research efforts on knowledge space theory.Firstly,the methods and principles of constructing knowledge structures are elaborated,the research contents related to the wellgradedness are introduced,and their importance to the study of knowledge space theory is underscored.The related work of surmise relation is summarized,as well as the research methods between problems and between items.Then,research progress of competence-based knowledge space theory is delineated from three aspects:skill maps,skill functions and competence-performance approaches.Furthermore,the researches combinating knowledge space theory with probability models and granular computing are outlined,including the application of knowledge space theory in assisted learning and adaptive testing.Finally,the key scientific issues are explored in the above research fields and some preliminary research ideas are provided,providing beneficial references for subsequent studies in this field.
Knowledge Space TheoryKnowledge StructureSkill MapWellgradednessSurmise Re-lationFormal Concept Analysis