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Testing Hypotheses
E
Close the dialog box.
The path diagram displays the parameter values you just specified.
This is not a very realistic example because the numbers 6 and 8 were just picked out
of the air. Meaningful parameter constraints must have some underlying rationale,
perhaps being based on theory or on previous analyses of similar data.
Specifying Equal Parameters
Sometimes you will be interested in testing whether two parameters are equal in the
population. You might, for example, think that the variances of recall1 and recall2
might be equal without having a particular value for the variances in mind. To
investigate this possibility, do the following:
E In the drawing area, right-click recall1 and choose Object Properties from the pop-up
menu.
E Click the Parameters tab.
E In the Variance text box, type v_recall.
E Click recall2 and label its variance as v_recall.
E Use the same method to label the place1 and place2 variances as v_place.
It doesn’t matter what label you use. The important thing is to enter the same label for
each variance you want to force to be equal. The effect of using the same label is to