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Estimating Variances and Covariances
As you scroll across the worksheet, you will see all of the test variables from the Attig
study. This example uses only the following variables: recall1 (recall pretest), recall2
(recall posttest), place1 (place recall pretest), and place2 (place recall posttest).
E After you review the data, close the data window.
E In the Data Files dialog box, click OK.
Analyzing the Data
In this example, the analysis consists of estimating the variances and covariances of the
recall and place variables before and after training.
Specifying the Model
E From the menus, choose Diagram > Draw Observed.
E In the drawing area, move your mouse pointer to where you want the first rectangle to
appear. Click and drag to draw the rectangle.
E From the menus, choose Edit > Duplicate.
E Click and drag a duplicate from the first rectangle. Release the mouse button to
position the duplicate.