Power given J, K and Dorfman-Berbaum-Metz variance components — SsPowerGivenJKDbmVarCom • RJafroc

Power given J, K and Dorfman-Berbaum-Metz variance components

SsPowerGivenJKDbmVarCom(
  J,
  K,
  effectSize,
  VarTR,
  VarTC,
  VarErr,
  alpha = 0.05,
  analysisOption = "RRRC"
)

Arguments

J: The number of readers
K: The number of cases
effectSize: The effect size
VarTR: The modality-reader DBM variance component
VarTC: The modality-case DBM variance component
VarErr: The error-term DBM variance component
alpha: The size of the test (default = 0.05)
analysisOption: Specify the random factor(s): "RRRC", "FRRC", "RRFC"

Value

A list containing the estimated power and associated statistics for the specified random factor(s).

Details

The variance components are obtained using St with method = "DBM".

Examples

VarCom <- St(dataset02, FOM = "Wilcoxon", method = "DBM", 
   analysisOption = "RRRC")$ANOVA$VarCom
VarTR <- VarCom["VarTR",1]
VarTC <- VarCom["VarTC",1]
VarErr <- VarCom["VarErr",1]
ret <- SsPowerGivenJKDbmVarCom (J = 5, K = 100, effectSize = 0.05, VarTR, 
   VarTC, VarErr, analysisOption = "RRRC")
##cat("RRRC power = ", ret$powerRRRC)