How is it that when I reverse-score an item I get completely different results in a MLM?

#1
How is it that when I reverse-score an item I get completely different results in a MLM? I reverse-scored an item so that a high score would represent high national identification instead of it representing low national identification. Scores range from 1 to 4. The item is used as a measure for national identification (individual-level variable) in a multilevel model. However, after reverse-scoring the item, I get completely different results.
 
#3
Thank you so much for your quick reply. For some reason I cannot attach my output here, so I uploaded them to Google Drive.
This is the file with the reverse-coded measure (NATIDF): https://drive.google.com/file/d/1ky6e1Hu5wDMoMxaGHJ6QF-S4noqikKDi/view
This is the file without the reverse-coded measure: https://drive.google.com/file/d/1lSvFswXbz__yAPFiCgc6tZCbDxUnPTgR/view

The variables IDF_ART and IDF_MPX are interaction variables (IDF_ART: NATIDF x ART_SIZE_SUM; IDF_MPX: NATIDF x MIPEX_score). You'll find an example of the differences in the last model. Some of the coefficients are different there, the significance as well, etc.
 

Dason

Ambassador to the humans
#4
I don't actually use SPSS but I'm more than happy to help interpret output. Is there any way you could upload the output in a pdf or word document?