Table 2.

Reliability Statistics and Item-total Correlation: Model-2 (28 items*)

Factors / Items	Sub-scale Corrected Item-Total Correlation	Sub-scale Variance if Item Deleted	Sub-scale Cronbach’s Alpha if Item Deleted
Factor 1: Reflexivity (Mean = 3.82 [SD = 0.59], Variance = 0.020, α = 0.80)
16. I ponder over what happens to me	0.49	13.117	0.79
18. I often think about why things happen	0.61	12.685	0.76
32. I’m keen on understanding why certain things happen to me	0.61	13.034	0.76
10. I’m interested in understanding my mental processes	0.61	12.539	0.76
17. I find beneficial to analyse my behaviour	0.59	12.594	0.76
6. Understanding what others feel is crucial in understanding their actions	0.41	14.339	0.80
Factor 2: Ego-strength (Mean = 3.38 [SD = 0.76], Variance = 0.013, α = 0.85)
30. I am able to cope with difficult situations	0.72	14.81	0.81
25. I am able to bear the emotional load of stressful situations	0.72	14.23	0.81
24. I am able to sort out difficult problems when life presents those to me	0.65	15.51	0.82
11. I can tolerate frustrations of daily life	0.58	15.51	0.83
22. I can usually adapt myself to different contexts with no difficulties	0.51	16.18	0.85
26. When I feel an intense emotion, I can control it	0.60	14.95	0.83
Factor 3: Relational attunement (Mean = 3.46 [SD = 0.74], Variance = 0.011, α = 0.79)
28. I can easily attune to other people’s thinking	0.60	9.37	0.74
5. I can tune in other other people’s mental states	0.64	8.54	0.72
14. I’m able to empathize with others when they tell me something	0.57	9.33	0.75
4. I’m able to get the deepest aspects of people around me	0.52	9.53	0.76
21. I am sensitive to what happens to others	0.49	9.46	0.77
Factor 4: Relational discomfort (Mean = 2.76 [SD = 0.84], Variance = 0.014, α = 0.74)
12. Others don’t understand me	0.58	11.63	0.68
9. Relationships with other people prevent me from being myself	0.53	12.16	0.68
27. People abandon me	0.55	11.45	0.69
15. I am afraid to open up with other people	0.46	12.24	0.71
33. Some people are the cause of my problems	0.39	13.06	0.74
Factors 5: Distrust (Mean = 3.34 [SD = 0.87], Variance = 0.13, α = 72)
13. It’s better to beware of others	0.55	3.51	0.60
29. It’s better to beware of strangers	0.56	3.57	0.59
20. I don’t trust others	0.49	3.42	0.68
Factors 6: Emotional dyscontrol (Mean = 2.90 [SD = 1.02], Variance = 0.068, α = 0.76)
7. I sometimes feel like I am losing control of my emotions	0.70	4.10	0.62
3. I sometimes experience mood swings I can’t control	0.68	4.09	0.65
23. It happens to me to have conflicting emotions	0.51	5.66	0.82

SD = standard deviation; α = Cronbach’s alpha

Cronbach’s alpha: If the scale is an exploratory one, a good reliability is set at α > 0.7. If the scale is an established one, a good reliability is set at α > 0.80

Corrected Item-Total Correlation: A good corrected item-total correlation is set at r(correlation coefficient) > 0.30

Scale Variance if Item Deleted and Cronbach’s Alpha if Item Deleted corresponding values indicate the scale dimension (factor) variance and Cronbach’s alpha if the relevant item is deleted. These metrics suggest that no item should be deleted

*Comparatively to the original MMQ (see Table 1), items 1 (“I often try to explain what is happening to me”), item 8 (“I am able to reflect on my behaviours”), and item 31 (“I am a thoughtful person”) were removed from the Factor 1; the item 19 (“For me things are either white or black”) was removed from the Factor 2, and the item 2 (“I am an impulsive person”) was removed from the Factor 6