Table 4 Estimated G-study and D-study results. 20 vignettes (v) 42 clinicians (c) within (:) 14 units (u)

v (vignettes)

19

1.061

50.4

u (units or CMHCs)

13

.087

4.2

c:u (clinicians within unit)

28

.029

1.4

vu (vignette by unit interaction)

247

.16

7.6

vc:u (vignette by clinician interaction - within unit)

532

.765

36.4

Total

839

2.102

100

D-study results for three different designs

Number of CMHCs (units)

n _u  = 1

n _u  = 1

n _u  = 1

Number of clinicians

n _c  = 1

n _c  = 2

n _c  = 3

${\sigma }_{\tau }^2$ (universe score variance)

1.061

1.061

1.061

${\sigma }_{\delta }^2$ (relative error variance)

.925

.543

.425

${\sigma }_{\Delta }^2$ (absolute variance)

1.042

.645

.512

Eρ² (generalizability coefficient: $\frac{{\sigma }_{\tau }^2}{{\sigma }_{\sigma }^2+{\sigma }_{\tau }^2}$)

.534

.661

.719

Φ (dependability coefficient: $\frac{{\sigma }_{\tau }^2}{{\sigma }_{\Delta }^2+{\sigma }_{\tau }^2}$)

.505

.622

.674