# Applied Psychometric Theory

## Documentation for package ‘psychometric’ version 2.4

- DESCRIPTION file
- Package README

## Help Pages

psychometric-package | Applied Psychometric Theory
ABHt32 | Table 3.2 from Arthur et al
alpha | Cronbach's Coefficient Alpha
alpha.CI | Confidence Interval for Coefficient Alpha
aprox.Qrbar | Meta-Analytic Q statistic for r-bar
aprox.vare | Sampling Error Variance
apt | Applied Psychometric Theory
aRxx | Artifact Distribtutions Used in Meta-Analysis
bRyy | Artifact Distribtutions Used in Meta-Analysis
CAFAA | Compound Attenuation Factor for Meta-Analytic Artifact Corrections
CI.alpha | Confidence Interval for Coefficient Alpha
CI.obs | Confidence Intervals for Test Scores
CI.Rsq | Confidence Interval for R-squared
CI.Rsqlm | Confidence Interval for Rsq - from lm()
CI.tscore | Confidence Intervals for Test Scores
CIr | Confidence Interval for a Correlation Coefficient
CIrb | Confidence Interval about Sample Weighted Mean Correlation
CIrbar | Confidence Interval about Sample Weighted Mean Correlation
CIrdif | Confidence Interval for the difference in Correlation Coefficients
CIz | Confidence Interval for Fisher z'
ClassUtil | Classical Utility of a Test
CredIntRho | Credibility Interval for Meta-Analytic Rho
cRR | Artifact Distribtutions Used in Meta-Analysis
cRRr | Correction for Range Restriction
CVF | Compound Variance Factor for Meta-Analytic Artifact Corrections
CVratio | Content Validity Ratio
discrim | Item Discrimination
EnterMeta | Enter Meta-Analysis Data
Est.true | Estimation of a True Score
FileDrawer | File Drawer N
FISHER r to z | Fisher r to z'
Fisher z to r | Fisher z' to r
FunnelPlot | Funnel Plot for Meta-Analysis
HSJt35 | Table 3.5 Hunter et al.
ICC.CI | Confidence interval for the Intra-class Correlation
ICC.lme | Intraclass Correlation Coefficient from a Mixed-Effects Model
ICC1.CI | Confidence interval for the Intra-class Correlation
ICC1.lme | Intraclass Correlation Coefficient from a Mixed-Effects Model
ICC2.CI | Confidence interval for the Intra-class Correlation
ICC2.lme | Intraclass Correlation Coefficient from a Mixed-Effects Model
item.exam | Item Analysis
MargUtil | Marginal and Total Utility of a Test
MetaTable | Summary function for 'Complete' Meta-Analysis
psychometric | Applied Psychometric Theory
pvaaa | Percent of Variance Accounted for by Artifacts in Rho
pvse | Percent of variance due to sampling error
Qrbar | Meta-Analytic Q statistic for r-bar
Qrho | Meta-Analytic Q statistic for rho
r.nil | Nil hypothesis for a correlation
r.null | Nil hypothesis for a correlation
r2z | Fisher r to z'
rbar | Sample size weighted mean correlation
rdif.nul | Null hypothesis for difference in two correlations
rhoCA | Meta-Analytically Derived Correlation Coefficient Corrected for Artifacts
SBlength | Spearman-Brown Prophecy Formulae
SBrel | Spearman-Brown Prophecy Formulae
SE.Est | Standard Errors of Measurement (test scores)
SE.Meas | Standard Errors of Measurement (test scores)
SE.Pred | Standard Errors of Measurement (test scores)
SErbar | Standard Error for Sample Size Weighted Mean Correlation
SERHET | Standard Error for Sample Size Weighted Mean Correlation
SERHOM | Standard Error for Sample Size Weighted Mean Correlation
SEz | Standard Error of Fishers z prime
SpearmanBrown | Spearman-Brown Prophecy Formulae
TestScores | Fictitious Test Scores for Illustrative Purposes
TotUtil | Marginal and Total Utility of a Test
Utility | Marginal and Total Utility of a Test
varAV | Variance Due to Attenuating Artifacts
vare | Sampling Error Variance
vare36 | Sampling Error Variance
varr | Sample Size weighted variance
varRCA | Variance in Meta-Analytic Rho
varRes | Residual Variance in Meta-Analytic Correlation
varResT | True residual variance in correlations
z2r | Fisher z' to r