Table 4.
Reliability Assessments
Stability and Equivalence | |||||
---|---|---|---|---|---|
QPE Subscales | Stability (Test–Retest) N = 16 | Equivalence (Inter-rater) N = 16 | |||
AH | 0.88 | 0.99 | |||
VH | 0.92a | 1.00 | |||
TotH | 0.82 | 1.00 | |||
D | 0.70 | 1.00 | |||
QPE | 0.81 | 1.00 | |||
Internal Consistency b and Inter-subscale Correlations | |||||
AH | VH | TotH | D | QPE | |
AH | L 0.78 | ||||
C 0.70 | |||||
VH | L 0.07 | L 0.86 | |||
C 0.29 | C 0.75 | ||||
TotH | L 0.48** | L 0.60** | L 0.75 | ||
C 0.75** | C 0.55** | C 0.76 | |||
D | L 0.51** | L 0.10 | L 0.58** | L 0.90 | |
C 0.39** | C 0.14 | C 0.55** | C 0.89 | ||
QPE | L 0.55** | L 0.47** | L 0.79** | L 0.58** | L 0.85 |
C 0.71** | C 0.46** | C 0.82** | C 0.55** | C 0.86 |
Note: AH, auditory hallucination total score; VH, visual hallucination total score; TotH, total hallucinations; D, delusions; QPE, total severity psychotic experiences on the Questionnaire for Psychotic Experiences; L, lifetime; C, current.
aReduced sample of 14 (see “Methods” section).
bInternal consistency is represented in bold on the diagonal and are reported as Cronbach’s α. Inter-subscale correlations ** significant at 0.001 using Kendall’s Tau.