Table 3.

Variance components. $\mathrm{C}=\text{case component}$; $\mathrm{R}=\text{reader}\text{component}$; $\mathrm{RC}=\text{reader-by-case component}$; $\mathrm{MC}=\text{modality-by-case}\text{component}$; $\mathrm{MR}=\text{modality-by-reader component}$; $\mathrm{MRC}=\text{modality-by-}\text{reader-by-case component}$, including residual error. Unbiased variance components were generated, which can be negative.

Variance component	Sequential ($\times {10}^{-3}$)	Independent 1 ($\times {10}^{-3}$)	Independent 2 ($\times {10}^{-3}$)
C	68	73	68
R	1.0	0.4	0.9
RC	66	19	19
Correlated	135	92	88
MC	4.9	0.8	7.0
MR	0.04	0.15	$-0.09$
MRC	29	87	77
Uncorrelated	34	88	84