Message/Author 

Ben Walsh posted on Monday, January 26, 2015  7:34 pm



I'm trying to test a 122 model, with a betweenlevel dichotomous moderator (w) of the xm relationship (all other var's continuous). My syntax (below) is based on Preacher et al. (10) and Preacher et al. (07). A colleague suggested I try xwith since x is a latent variable at L2 and w is observed. However, I receive the errors below. VARIABLE: NAMES ARE group w other m y other2 x; USEVARIABLES ARE group w m y x; CLUSTER IS group; BETWEEN ARE m y w; ANALYSIS: TYPE IS TWOLEVEL RANDOM; estimator = mlr; ALGORITHM=INTEGRATION; MODEL: %WITHIN% x; %BETWEEN% m y w; xw  x xwith w; y on m (b1) x w xw; m on x (a1) w xw (a3); *** ERROR in MODEL command The XWITH option is not available for observed variable interactions. Use the DEFINE command to create an interaction variable. Problem with: XW  X XWITH W I've tried DEFINE command, but haven't had success because it identifies within variability in x (which there is, but I only want to specify the interaction at L2, using the x corrected for sampling error). 


You can put a factor behind x on between and use the factor in the XWITH statement. Putting a factor behind x makes it equivalent to x. f BY x@1; x@0; 

Ben Walsh posted on Tuesday, January 27, 2015  7:18 pm



Thank you for the feedback. I will give this a try. 

Ben Walsh posted on Wednesday, January 28, 2015  8:04 am



I used your suggestion with syntax below: VARIABLE: NAMES ARE group w other m y other2 x; USEVARIABLES ARE group w m y x; CLUSTER IS group; BETWEEN ARE m y w; ANALYSIS: TYPE IS TWOLEVEL RANDOM; estimator = mlr; ALGORITHM=INTEGRATION; MODEL: %WITHIN% x; %BETWEEN% m y w; fx BY x@1; x@0; fxw  fx xwith w; y on m (b1) fx w fxw; m on fx (a1) w fxw (a3); However, now I receive: THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NONPOSITIVE DEFINITE FIRSTORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS 0.133D17. PROBLEM INVOLVING PARAMETER 14. Thank you for any feedback. 


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