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Unobserved Variables
Creating the Path Diagram
Now you are ready to draw the model as shown in the path diagram on page 83. There
are a number of ways to do this. One is to start by drawing the measurement model
first. Here, we draw the measurement model for one of the latent variables, knowledge,
and then use it as a pattern for the other three.
E Draw an ellipse for the unobserved variable knowledge.
E From the menus, choose Diagram > Draw Indicator Variable.
E Click twice inside the ellipse.
Each click creates one indicator variable for knowledge:
As you can see, with the
Draw indicator variable button enabled, you can click multiple
times on an unobserved variable to create multiple indicators, complete with unique or
error variables. Amos Graphics maintains suitable spacing among the indicators and
inserts identification constraints automatically.