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Unstable mean number of visits |
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Dear Professors, we are running a twolevel growth model for three visits (coded 0, 1, and 2). Thus, the mean of visits cannot be greater than 1.0. When we run the unconditional growth model: ANALYSIS: TYPE IS TWOLEVEL RANDOM; MODEL: %WITHIN% s | WTAR ON Visit; %BETWEEN% WTAR WITH s; The mean of Visit is 0.872. When I add a single covariate (age zeroed (youngest participants is aged 0): MODEL: %WITHIN% s | WTAR ON Visit; %BETWEEN% WTAR s ON Age_zero; I get a mean of visits of 1.7. Since this is not possible, and my data are the same for both models, I am confused as to how or why this has happened. Thank you, for your assistance. Romola |
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When you say "mean of Visit", do you mean "mean of s"? If not, send the 2 outputs and data to Support along with your license number. |
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