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1-1-1 model with level1 &level2 moder... |
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rui tao posted on Wednesday, October 16, 2019 - 1:58 am
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Hi, I'm trying the model with the following syntax: usevari = clus wi ub pp dp aga int; cluster = clus; WITHIN = pp wi dp int; BETWEEN = aga; missing =all(999); DEFINE: int =wi*dp; CENTER pp wi dp (groupmean); CENTER aga(grandmean); ANALYSIS: TYPE = twolevel; MODEL: %WITHIN% dp on pp(a); ub on dp(b); ub on int(c); ub on wi pp; %BETWEEN% ub on aga; MODEL CONSTRAINT: new(s_high s_low); s_high=a*(b+c*1.83); s_low=a*(b+c*0.83); I want to test whether wi moderates the path from dp to ub and the result says yes (the model fits badly though,CFI=0.647,RMSEA=0.148), but the prompt keeps appearing as followed: THE STANDARD ERRORS OF THE MODEL PARAMETER ESTIMATES MAY NOT BE TRUSTWORTHY FOR SOME PARAMETERS DUE TO A NON-POSITIVE DEFINITE FIRST-ORDER DERIVATIVE PRODUCT MATRIX. THIS MAY BE DUE TO THE STARTING VALUES BUT MAY ALSO BE AN INDICATION OF MODEL NONIDENTIFICATION. THE CONDITION NUMBER IS 0.276D-21. PROBLEM INVOLVING THE FOLLOWING PARAMETER: Parameter 1, %WITHIN%: [ DP ] Not sure whether I am getting this right, can anyone tell me if there's anything wrong with my syntax and if yes, how shall I correct it? |
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