Design of Polytomous Cognitively Diagnostic Test Blueprint——For the Independent and the Rhombus Attribute Hierarchies
Ding Shu-lian · Journal of Jiangxi Normal University · 2014
Given a polytomous scoring rule,suppose that there is no compensation among the attributes,the design of polytomous cognitive diagnostic test blueprint for the independent and the rhombus attribute hierarchies after defining the rhombus type and the maximum set of non-comparable attributes is discussed.The structures of the test Q matrix,named as perfect Q matrix,for the 2 types are obtained.The perfect Q matrix contains the fewest columns and is the bijective mapping between the set of the knowledge states and the set of the expected response patterns The perfect Q matrix for the polytomous,which is restricted with its rank or the number of the maximum set of noncomparable attributes in the basic attribute hierarchy,is different from that for the dichotomous.