|
|
 |
| Measurement invariance with binary data |
 
|
| Message/Author |
|
|
| ffan posted on Tuesday, July 15, 2014 - 8:24 pm
|
|
|
Hi,
I am doing a six-group measurement invariance study. I compared the configural model with the fully constrained model, finding out that there is no full measurement invariance. Then I am detecting partial invariance and try to find out which item(s) shows measurement noninvariance by comparing the configural model to a scalar model by freeing an item at a time (altogether I have 21 items), but I keep getting warning messages as follows:
CORRELATION MATRIX (WITH VARIANCES ON THE DIAGONAL)
ITEM21
________
WARNING: THE BIVARIATE TABLE OF ITEM17 AND ITEM8 HAS AN EMPTY CELL.
WARNING: THE BIVARIATE TABLE OF ITEM17 AND ITEM14 HAS AN EMPTY CELL.
WARNING: THE BIVARIATE TABLE OF ITEM17 AND ITEM12 HAS AN EMPTY CELL.
THE MODEL ESTIMATION TERMINATED NORMALLY
THE CHI-SQUARE COMPUTATION COULD NOT BE COMPLETED
BECAUSE OF A SINGULAR MATRIX.
I do not know how I should handle this. Any suggestions would help.
Thanks. |
|
|
|
|
| You want to avoid empty cell situations, so try deleting item 17 which is mentioned in all 3 messages. |
|
|
| Back to top |
|
|
