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14
Chapter 2
Constraining a Parameter
To identify the regression model, you must define the scale of the latent variable Other.
You can do this by fixing either the variance of Other or the path coefficient from Other
to SAT at some positive value. The following shows you how to fix the path coefficient
at unity (1).
E In the drawing area, right-click the arrow between Other and SAT and choose Object
Properties
from the pop-up menu.
E Click the Parameters tab.
E In the Regression weight text box, type 1.
E Close the Object Properties dialog box.
There is now a
1 above the arrow between Other and SAT. Your path diagram is now
complete, other than any changes you may wish to make to its appearance. It should
look something like this: