Stella Zac posted on Thursday, March 28, 2013 - 2:54 pm
Hi, I am a new user of Mplus and APIM.
My APIM model is: MODEL: qolph2 on closa pclosa; pqolph2 on closa pclosa; pqolph2 with qolph2; closa with pclosa;
Now my results of APIM model is very strange,please notice the coefficients in the qolph2 on closa and pclosa, and the coefficients in the pqolph2 on closa and pcloas. They are only reverse, not difference on the numbers.
It looks like there is a problem in the data in that QOLPH2 and PQOLPH2 are strongly related, perhaps just an exact transformation of each other.
Stella Zac posted on Friday, March 29, 2013 - 8:08 am
To my understand to APIM pairwise dataset, qolph2 and pqolph2, closa and pclosa are exactly the same.You can have a look of my dataset:
dyad HIV qolph2 closa pqolph2 pclosa 1 1 18 5 19 4 1 -1 19 4 18 5 2 1 15 5 17 3 2 -1 17 3 15 5 ...... If list all data record, all the mean, sd for the qolph2 and pqolph2, closa and pclosa should be the same.
But that's what I learnt from the dyadic data analysis dataset format.
Is there anything wrong with my dataset format for APIM in mplus?