Learn R Programming

READ ME

The following changes have been made since version 0.1.0 of Applied Psychometric Theory

Changes in 0.1.1

  1. There was an error in alpha.CI (error fixed)
  2. Defaults in alpha.CI have been changed (level = .90, onesided=FALSE)
  3. A new function 'MetaTable' has been added to summarize various MetaAnalysis functions.

Changes in 0.1.2

  1. There was an error in the df of the calculation of the upper CI for ICC1 and ICC2

Changes in 2.0

  1. My affiliation has changed from @umsl.edu to @statefarm.com
  2. Item.Exam() was updated to include item.total correlation without item included

Changes in 2.1

  1. in the help and R files, na.rm=T is replaced with na.rm=TRUE
  2. an extra '(' was removed from the help file description of ICC1.lme()
  3. a grammar error was corrected in help file for cRR() resulting in error in reading in newer versions.

Changes in 2.2

  1. revised help and Rd files
  2. re-compiled to work under R 2.11.1

Changes in 2.3

  1. changed affiliation to @gmail.com
  2. used both purrr and dplyr functions to replace attach/detach of data
  3. updated function "GmeanRel" from nlme to "gmeanrel" - a dependency for functions ICC1, ICC2

Changes in 2.4

  1. label items standardized for compatibility with R 4.3.0

Copy Link

Version

Install

install.packages('psychometric')

Monthly Downloads

817

Version

2.4

License

GPL (>= 2)

Maintainer

Thomas Fletcher

Last Published

November 5th, 2023

Functions in psychometric (2.4)

CVratio

Content Validity Ratio
ClassUtil

Classical Utility of a Test
Utility

Marginal and Total Utility of a Test
FileDrawer

File Drawer N
ICC.lme

Intraclass Correlation Coefficient from a Mixed-Effects Model
alpha.CI

Confidence Interval for Coefficient Alpha
SErbar

Standard Error for Sample Size Weighted Mean Correlation
EnterMeta

Enter Meta-Analysis Data
SE.Meas

Standard Errors of Measurement (test scores)
Qrho

Meta-Analytic Q statistic for rho
r2z

Fisher r to z'
MetaTable

Summary function for 'Complete' Meta-Analysis
Qrbar

Meta-Analytic Q statistic for r-bar
SpearmanBrown

Spearman-Brown Prophecy Formulae
r.nil

Nil hypothesis for a correlation
cRRr

Correction for Range Restriction
pvaaa

Percent of Variance Accounted for by Artifacts in Rho
pvse

Percent of variance due to sampling error
discrim

Item Discrimination
SEz

Standard Error of Fishers z prime
varResT

True residual variance in correlations
rbar

Sample size weighted mean correlation
TestScores

Fictitious Test Scores for Illustrative Purposes
item.exam

Item Analysis
psychometric-package

Applied Psychometric Theory
varr

Sample Size weighted variance
varRCA

Variance in Meta-Analytic Rho
rdif.nul

Null hypothesis for difference in two correlations
varRes

Residual Variance in Meta-Analytic Correlation
alpha

Cronbach's Coefficient Alpha
vare

Sampling Error Variance
z2r

Fisher z' to r
artifacts

Artifact Distribtutions Used in Meta-Analysis
rhoCA

Meta-Analytically Derived Correlation Coefficient Corrected for Artifacts
varAV

Variance Due to Attenuating Artifacts
CVF

Compound Variance Factor for Meta-Analytic Artifact Corrections
ABHt32

Table 3.2 from Arthur et al
CIr

Confidence Interval for a Correlation Coefficient
HSJt35

Table 3.5 Hunter et al.
CI.tscore

Confidence Intervals for Test Scores
CI.Rsqlm

Confidence Interval for Rsq - from lm()
CIrb

Confidence Interval about Sample Weighted Mean Correlation
CAFAA

Compound Attenuation Factor for Meta-Analytic Artifact Corrections
CredIntRho

Credibility Interval for Meta-Analytic Rho
Est.true

Estimation of a True Score
CIz

Confidence Interval for Fisher z'
CIrdif

Confidence Interval for the difference in Correlation Coefficients
ICC.CI

Confidence interval for the Intra-class Correlation
CI.Rsq

Confidence Interval for R-squared
FunnelPlot

Funnel Plot for Meta-Analysis