classify: Classification Accuracy and Consistency under IRT models.

IRT classification uses the probability that candidates of a given ability, will answer correctly questions of a specified difficulty to calculate the probability of their achieving every possible score in a test. Due to the IRT assumption of conditional independence (that is every answer given is assumed to depend only on the latent trait being measured) the probability of candidates achieving these potential scores can be expressed by multiplication of probabilities for item responses for a given ability. Once the true score and the probabilities of achieving all other scores have been determined for a candidate the probability of their score lying in the same category as that of their true score (classification accuracy), or the probability of consistent classification in a category over administrations (classification consistency), can be calculated.

AuthorDr Chris Wheadon and Dr Ian Stockford
Date of publication2014-08-17 12:17:00
MaintainerDr Chris Wheadon <chris.wheadon@gmail.com>
LicenseGPL (>= 2)
Version1.3

View on CRAN

Functions

across-reps Man page
across.reps Man page
across.reps,classification-method Man page
across.reps-methods Man page
beta.list Man page
biology Man page
classification Man page
classification-class Man page
classify Man page
classify.bug Man page
classify-package Man page
expected.rc Man page
gpcm Man page
gpcm.bug Man page
gpcm.rc Man page
pcm Man page
physics Man page
plot.classification Man page
plot.scores Man page
rasch Man page
scores-class Man page
scores.gpcm.bug Man page
scores,missing-method Man page
summary Man page
summary,classification-method Man page
summary-methods Man page
thpl Man page
tpl Man page
wlord Man page

Files

classify
classify/inst
classify/inst/CITATION
classify/inst/bugs
classify/inst/bugs/rasch.bug
classify/inst/bugs/gpcm.bug
classify/inst/bugs/tpl.bug
classify/inst/bugs/pcm.bug
classify/src
classify/src/Makevars
classify/src/exp.cpp
classify/src/rcpp_w_lord.h
classify/src/rcpp_w_lord.cpp
classify/src/Makevars.win
classify/src/gpcm.cpp
classify/src/gpcm.h
classify/src/exp.h
classify/NAMESPACE
classify/data
classify/data/biology.rda
classify/data/datalist
classify/data/physics.rda
classify/R
classify/R/bugs.R classify/R/w_lord.R classify/R/scores.R classify/R/prob_functions.R classify/R/classify.R classify/R/gpcm.rc.R
classify/MD5
classify/DESCRIPTION
classify/man
classify/man/gpcm.bug.Rd classify/man/rasch.Rd classify/man/gpcm.Rd classify/man/summary-methods.Rd classify/man/thpl.Rd classify/man/w_lord.Rd classify/man/plot-methods.Rd classify/man/classify-package.Rd classify/man/physics.Rd classify/man/scores-class.Rd classify/man/gpcm.rc.Rd classify/man/classify.Rd classify/man/across.reps-methods.Rd classify/man/classify.bug.Rd classify/man/scores.gpcm.bug.Rd classify/man/classification-class.Rd classify/man/pcm.Rd classify/man/biology.Rd classify/man/expected.rc.Rd classify/man/beta.list.Rd classify/man/tpl.Rd

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