HLM运行后View Output窗口显示“For starting values, data from 83 level-1 and 55level-2 records were used V11(GLS) is not positive-definite There is a problemin the fixed portion of the model. Anear singularity is likely. Possiblesources are a collinearity or multicollinearity among the predictors. We suggest that you examine a correlationmatrix among the fixed effect predictors.”大概是存在共线性,不知道我理解的是否准确,但使用SPSS对共线性进行检查后并未发现严重的共线性,请问问题出在哪儿?