spss信度太低怎么修改数据让它高一点

1、首先选择分析-度量-信度分析，如图所示。
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2、然后打开对话框，如下图所示。
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3、然后再将问卷题目选入变量框中，如图所示。
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4、这时候还需要选择右边的统计量打开，如图所示。
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5、接着选择其中的几个选项，如图所示。
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6、最后点击确定，生成结果。然后看那些不降反升的题目，就可以考虑剔除。

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数据之间的跨度要大一点才行。如果某个选项受试者选择的数值都是一样的，这样的问题多了，信度就会很低。