Significace of non-linear slopes PreviousNext
Mplus Discussion > Growth Modeling of Longitudinal Data >
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 Anonymous posted on Friday, June 24, 2005 - 10:20 am
How do you test if you should include a non-linear slope in the model?

Do you compare model fit with and without the higher order slope term? If so, if there is a significant difference, do you conclude that the higher order slope accounts for significant variance in the model?

Thanks.
 BMuthen posted on Sunday, June 26, 2005 - 8:11 am
Yes, you compare those two models. But a significant difference may only indicate that the mean of the non-linear slope is significantly different from zero not necessarily the variance.
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