Table 2.
Construct validity of the social inhibition domain: exploratory factor analysis of sum scores.
| Factor I | Factor II | |
|---|---|---|
| Negative affectivity (DS14-NA) | 0.56 | 0.24 |
| Depression (PHQ-9) | 0.92 | −0.13 |
| Negative mood (GMS-NA) | 0.91 | −0.11 |
| Positive mood (GMS-PA) | −0.56 | −0.09 |
| Anxiety (GAD-7) | 0.55 | 0.32 |
| Social inhibition (DS14-SI) | 0.01 | 0.76 |
| Interaction anxiety (SIAS10) | 0.18 | 0.73 |
| Behavioral inhibition (BIS) | −0.05 | 0.62 |
| Emotional inhibition (ECQ-2) | −0.10 | 0.61 |
| Social phobia (SPS11) | 0.27 | 0.41 |
| Loneliness (UCLA-R-S) | 0.24 | 0.36 |
|
Eigenvalue |
4.9 |
1.6 |
| % of variance | 44% | 14% |
Bold values reflect scales selected for each factor. DS-14: 14-item Type D Scale; NA: negative affectivity; PHQ-9: 9-item Patient Health Questionnaire; GMS: Global Mood Scale; PA: positive affectivity; GAD: Generalized Anxiety Disorder; SIAS: Social Interaction Anxiety Scale; BIS: Behavioral Inhibition Scale; ECQ-2: Emotional Inhibition subscale from the Emotional Control Questionnaire; SPS: Social Phobia Scale; UCLA-R-S: University of California, Los Angeles Loneliness Scale.