SEM，出现错误，求援！！！

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An error occurred while attempting to fit the model.

The sample moment matrix is not positive definite. It could fail to be positive definite for any of the following reasons:

1. The sample covariance matrix or the sample correlation matrix contains a date entry error.

2. The observed variables are linearly dependent (perhaps because the sample size is too small).

3. The sample covariance matrix or sample correlation matrix was computed form incomplete data using the method of

“pairwise deletion”.

4. The sample correlation matrix contains correlation coefficients other than product moment correlations (such as tetrachoric correlations).

For maximum likelihood estimation only, it maybe appropriate to check “allow non-positive definite sample covariance matrices” in the “Analysis Properties” window, or to use the non-positive method.

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关键词：SEM correlations coefficients correlation appropriate following positive occurred because perhaps

提示样本协方差矩阵非正定，你检查下：
1.有没有数据录入错误
2. 样本量是不是太小了
3. 数据是不是存在缺失值