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abroad 发表于 2011-7-2 17:44

急求助:路径所解释的方差(R2)值是怎么计算出来的

<br /> 看了一篇文章,作者列出了每个依变量的R2值,以及每条路径的系数和显著性,但他同时还给出了每个潜变量对它所对应的依变量的R2值。例如变量A到C的路径系数是0.294,变量B到C的路径系数是0.567,变量C的R2值是0.41.于是作者接着指出变量A可以解释变量C9%的方差,变量B可以解释变量C32%的方差,但没有说明这个结果是怎么来的。我用AMOS进行分析,没有看到关于变量与变量之间的R2值的结果,也百思不得其解作者究竟是怎么得出32%和9%的值的。请问各位高人能否指点一二。拜谢。<br /> 原文如下:<br /> Next,&nbsp;&nbsp;the path&nbsp;&nbsp;significance&nbsp;&nbsp;of each hypothesized association in the research model and variance explained&nbsp;&nbsp;(R2&nbsp;&nbsp;value)&nbsp;&nbsp;by&nbsp;&nbsp;each path&nbsp;&nbsp;were&nbsp;&nbsp;examined. Figure&nbsp;&nbsp;3 shows the&nbsp;&nbsp;standardized&nbsp;&nbsp;path&nbsp;&nbsp;coefficients and path&nbsp;&nbsp;significances, as reported&nbsp;&nbsp;by EQS. <br /> Intention&nbsp;&nbsp;to continue IS use was predicted&nbsp;&nbsp;by satisfaction&nbsp;&nbsp;(P = 0.57) and perceived&nbsp;&nbsp;usefulness (P&nbsp;&nbsp;= 0.29), which&nbsp;&nbsp;explained 32% and 9% of&nbsp;&nbsp;the&nbsp;&nbsp;intention&nbsp;&nbsp;variance respectively.<br />                                                                                                <img src="http://397.edu.pinggu.com/attachments/month_1012/1012300532d37654fd144e2c67.gif.thumb.jpg" border="0" id="aimg_825723" onmouseover="showMenu(this.id, false, 2)" />

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