FIMIX - Assessment of heterogenity level
Posted: Wed Jun 05, 2019 2:41 pm
Dear Forum,
I need a little help in interpreting FIMIX results in conjunction with a multi-group analysis (MGA) that has been done independently from FIMIX. The model is based on a total of 270 evaluable answers.
Based on control considerations, a MGA was already performed which revealed significant differences (significant with p< 0,01 and p <0.05) for four relationships between variables (controls were not considered as they are included as single items in the model). The requirements for a MGA are fulfilled (based on MICOM, step 2, not step 3).
The FIMIX analysis was performed for the model shown below (i.e., including control variables and moderators). The results from the FIMIX analysis are shown below:
My questions to the forum are:
1) Is it correct that it is advisable for a MGA that no control variables are considered as a single indicator?
2) Is it correct that the FIMIX data indicates a solution between 1 and a maximum of 3 segments (independent of the EN value for a 4-segment solution)?
3) Is it correct that there is no significant problem of unobstructed heterogeneity, as the CAIC result indicates one segment and the case numbers for a 2 or 3 segment solution (50 cases for 2 segments; 85 and 32 cases for 3 segments) for further examination is too small. Or would you limit the analysis to the first two segments in the 3-segment solution (with 153 and 85 cases)?
4) I would have expected that the results from the MGA are more or less reflected in the FIMIX analysis. The number of cases for the MGA is 145 (group 1) and 125 (group 2). What explanation could be made that this combination is not apparent?
I would be very happy about your feedback!
Best regards
Holger
I need a little help in interpreting FIMIX results in conjunction with a multi-group analysis (MGA) that has been done independently from FIMIX. The model is based on a total of 270 evaluable answers.
Based on control considerations, a MGA was already performed which revealed significant differences (significant with p< 0,01 and p <0.05) for four relationships between variables (controls were not considered as they are included as single items in the model). The requirements for a MGA are fulfilled (based on MICOM, step 2, not step 3).
The FIMIX analysis was performed for the model shown below (i.e., including control variables and moderators). The results from the FIMIX analysis are shown below:
My questions to the forum are:
1) Is it correct that it is advisable for a MGA that no control variables are considered as a single indicator?
2) Is it correct that the FIMIX data indicates a solution between 1 and a maximum of 3 segments (independent of the EN value for a 4-segment solution)?
3) Is it correct that there is no significant problem of unobstructed heterogeneity, as the CAIC result indicates one segment and the case numbers for a 2 or 3 segment solution (50 cases for 2 segments; 85 and 32 cases for 3 segments) for further examination is too small. Or would you limit the analysis to the first two segments in the 3-segment solution (with 153 and 85 cases)?
4) I would have expected that the results from the MGA are more or less reflected in the FIMIX analysis. The number of cases for the MGA is 145 (group 1) and 125 (group 2). What explanation could be made that this combination is not apparent?
I would be very happy about your feedback!
Best regards
Holger