About bookmark difficulty locations, the relationship between and within IRT models and RP values were compared by Spearman coefficient.
在书签难度位置排序方面， 本研究以实徵与模拟资料， 以斯皮尔曼相关系數进行相（不） 同IRT模式， 不（相） 同RP值之间的比较；
Method of comprehensive evaluation, spearman rank relational coefficient and cluster analysis were employed.
研究方法综合评价法，秩相关系数法，聚类分析法。
Method of comprehensive evaluation, spearman rank relational coefficient and cluster analysis were employed.
研究方法综合评价法，秩相关系数法，聚类分析法。
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