Assessment of Item and Test parameters: Cosine Similarity Approach

The paper proposes new measures of difficulty and discriminating values binary items test consisting such find their relationships including estimation error variance thereby the reliability, as per definition using cosine similarities. use entire data. Difficulty value item is defined function angle between observed score vector maximum possible vector. Discriminating an are taken coefficient variation (CV) respectively. Each ranges 0 1 like item. With increase in number correct answer to item, curve increases decreases. point intersection two curves can be used for deletion along with other criteria. Cronbach alpha was expressed computed terms Relationship derived reliability theoretical definition. Empirical verifications proposed were undertaken. Future studies suggested.re enter text.