THE EFFECTS OF ITEM GROUPING ON THE RELIABILITY AND SCALE SCORES OF AN AFFECTIVE MEASURE
THE EFFECTS OF ITEM GROUPING ON THE RELIABILITY AND SCALE SCORES OF AN AFFECTIVE MEASURE
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DOI：
10.1177/0013164493053001023
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发表时间：
1993-03-01
影响因子：
2.7
通讯作者：
MELNICK, SA
中科院分区：
文献类型：
--
作者：
MELNICK, SA
仪器开发人员在文献中发现了相互矛盾的建议，即要么将项目分组在一起，旨在测量每个结构，要么在整个仪器中随机分散项目。本文研究了分组和随机项目放置对量表和量表在情感测量上的α内部一致性信度的影响。在随机抽取的992名校长中，有719名校长回答了“对不满意教师的行政态度调查”；350人收到了分组版本的仪器，369人收到了随机版本的仪器。虽然两种项目放置方法在量表均值上没有显著差异，但对量表α信度有影响。
Instrument developers find conflicting advice in the literature about either grouping items together that purport to measure each construct or to randomly intersperse items throughout the instrument. This paper examines the effects of grouping and random item placement on the alpha internal-consistency reliabilities of the scales and scale means on an affective measure. Out of a total of 992 randomly selected principals, 719 responded to the Administrative Attitudes Toward Unsatisfactory Teachers Survey; 350 received a grouped-item version of the instrument and 369, a random-item version. While there were no significant differences in scale means between the two methods of item placement, there was an effect on the scale alpha reliabilities.