Table 1: Exploratory Factor Analysis of the PDI in SSD.

Items from the PDI-21 are summarized by key theme (Item). A 4-factor solution is proposed. Loading scores with absolute value>0.1 are shown; loading scores are bolded when meeting threshold of >0.4 and considered loaded to the corresponding factor. Items loaded to each factor show shared features which are named at the bottom of the table.

Item	Factor 1	Factor 2	Factor 3	Factor 4
1. hints/double meaning	0.807	−0.111
2. special messages from TV	0.434	0.136	0.303	0.147
3. people not what they seem	0.511	0.113		0.316
4. persecuted	0.800		−0.133
5. conspiracy	0.780
6. being someone very important		0.664		0.155
7. special or unusual person	0.284	0.603		0.132
8. especially close to God	−0.125	0.867
9. telepathic communication	0.473	0.15	0.338	−0.322
10. influenced by electrical devices		0.246	0.501
11. chosen by God		0.843		−0.135
12. belief in witchcraft/voodoo	0.245	0.309	0.201	−0.151
13. partner unfaithful				0.723
14. sinned more than average		0.11	0.239	0.495
15. people looking oddly at you	0.400		0.154	0.455
16. no thoughts in head	−0.212		0.599	0.255
17. world about to end	0.28	0.281	0.156	0.133
18. thoughts feel alien	0.139		0.705
19. thoughts overheard	0.345		0.399
20. thoughts echoing back			0.672
21. being a robot/zombie			0.631	0.173
Common Features	Paranoia	Grandiosity	Selfhood Disruption	Low Self Worth