dataanlysis 发表于 2011-7-2 23:50
single arrow stands for causal relation and double arrow stands for correlation.<br /> normally, you would run a preliminary model with all the latent variables correlated.<br /> if the model is identified, that means your causal model will be identifed, too.<br /> as to the causal relationship, that is, the direction of the arrows need to be guided by theories and previous studies.<br /> you can also use modification index as help to add or remove the paths, but still the model needs to be according to theories instead of SEM program.偏最小二乘 发表于 2011-7-2 23:55
<strong> 21# <i>qoop</i> </strong> <br /> <br /> 谢谢~~~~~~~~~~~~~~~~~~~~~华南心理学 发表于 2011-7-3 00:00
在做此类的FULL SEM之前,检验用来测量各个latent variable的问卷或工具的measurement model是一个很重要的步骤,这对整个struatural model的模型拟合和结果解释具有重要的影响。如果楼主没有做过这一步骤,可以尝试一下。潜变量分析 发表于 2011-7-3 00:05
<strong> 23# <i>liuliqingdong</i> </strong> <br /> <br /> 谢谢51jijin 发表于 2011-7-3 00:10
感觉你变量间的关系太多了,由于待估协方差个数太多,样本容量如果不够,肯定拟合效果不好。因子分析 发表于 2011-7-3 00:15
<strong> 25# <i>mzl79</i> </strong> <br /> 谢谢spsschina 发表于 2011-7-3 00:20
学习一下 <img src="http://bbs.pinggu.org/images/smilies/grapeman/08.gif" smilieid="48" border="0" alt="" />因子分析 发表于 2011-7-3 00:25
觉得你的外生潜变量相关关系没有画全,<br /> 既然外生潜变量邻接的两个两两相关,必然全部两两相关,把所有相关关系限定加上去,拟合质量会更高的。<br /> 有相关关系的外生潜变量,可能说到某些共同因子的作用,不限定这些相关性,模型拟合的适度会急剧下降。潜变量分析 发表于 2011-7-3 00:30
看不懂。。今晚上开始学lisrel,我果真是学前班的 <img src="http://bbs.pinggu.org/images/smilies/default/em06.gif" smilieid="140" border="0" alt="" />页:
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