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Constraining slopes to equality |
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Hi, In a latent growth model with 2 variables each measured at 3 timepoints, is it possible to constrain the slope values to be equal between the two variables? I’m interested in evaluating whether the rate of change is different for the 2 variables in my model, so to test this I would like to compare the fit of a model with the constrained slopes to the fit of a model with unconstrained slopes. Thanks for your help! |
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Yes, this can be done. i1 s1 | y1@0 y2@1 y3@2; i2 s2 | z1@0 z2@1 z3@2; [s1] (1); [s2] (1); holds the means of the slope growth factors equal. s1 (2); s2 (2); holds the variances of the slope growth factors equal. |
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