Table 2.

Reliability measures for subscales derived from the Prodromal Questionnaire (PQ-16)

PQ-16 scale	Min	Max	Skew	Kurtosis	αa
Total PLE	0	9	1.84	3.65	0.69
Total PLE distress	0	10	1.77	2.79	0.58
Perceptual scale
Total	0	5	2.79	8.48	0.62
Distress	0	6	2.61	6.81	0.47
Delusional scale
Total	0	4	1.51	1.84	0.46
Distress	0	5	1.79	2.88	0.28
Negative scale
Total	0	2	1.79	2.20	0.13
Distress	0	3	3.01	10.00	0.18

^aα = Cronbach’s alpha