结构方程模型及其在生态学中的应用

王酉石, 储诚进

A brief introduction of structural equation model and its application in ecology

WANG You-Shi, CHU Cheng-Jin

图1 结构方程模型的图形表示形式, 涉及1个自变量(x1)和3个因变量(y1, y2和y3)。其中γ (γ11, γ21和γ31)表示的是变量x对变量y的影响, β (β21和β32)表示的是变量y之间的影响, ξ表示响应变量的残差(改自Grace, 2006)。

Fig. 1 The generic graph demonstration of structural equation model, which involves one independent variable (x1) and three dependent variables (y1, y2 and y3). γ (γ11, γ21 and γ31) represent the effects of x variable on y variables, and β (β21 and β32) represent the effects among y variables. The residual variances are denoted by ξ (Modified from Grace, 2006).