aFIPC.R
In seonghobae/k.aefa: legacy code of kaefa
source('https://raw.githubusercontent.com/seonghobae/k.aefa/master/k.aefa3.R')
autoFIPC <- function(newformXData = ..., oldformYData = ..., newformCommonItemNames = ..., oldformCommonItemNames = ..., itemtype = '3PL', newformBILOGprior = NULL, oldformBILOGprior = NULL, tryFitwholeNewItems = T, tryFitwholeOldItems = T, checkIPD = T, tryEM = T, freeMEAN = T, forceNormalZeroOne = F, parameterOverwrite = F, empiricalhist = F, ...){
# print credits
message('automated Fixed Item Parameter Calibration: aFIPC 0.2')
message('Seongho Bae ([email protected])\n')
try(invisible(gc()), silent = T) # garbage cleaning
# checking configure
if(length(newformCommonItemNames) != length(oldformCommonItemNames)){
stop('Common Items are not equal')
}
if(length(newformCommonItemNames) == 0 | length(oldformCommonItemNames) == 0){
stop('Please provide common item names')
}
# checking common items
message('Checking correspond common item names')
to <- rep("<<<", length(newformCommonItemNames))
print(data.frame(cbind(newformCommonItemNames, to, oldformCommonItemNames)))
correspondItems <- data.frame(cbind(newformCommonItemNames, oldformCommonItemNames))
checkCorrect <- function()
{
n <- readline(prompt="Is it correct? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(checkCorrect())
}
return(as.integer(n))
}
confirm <- checkCorrect()
if(confirm != 1){
stop('Please write down pairs correctly')
}
# estimate models for calibration
if(!is.data.frame(oldformYData) && !is.matrix(oldformYData)){ # if Data is mirt model
oldFormModel <- oldformYData
oldformYDataK <- data.frame(oldFormModel@Data$data)
} else { # if Data is data.frame
oldformYDataK <- oldformYData
if(itemtype == '3PL' && length(oldformBILOGprior) == 0){
checkoldformBILOGprior <- function()
{
n <- readline(prompt="Do you want to use default BILOG-MG priors for oldform Data? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(readinteger())
}
return(as.integer(n))
}
oldformBILOGprior <- checkoldformBILOGprior()
if(oldformBILOGprior == 1){
oldformBILOGprior <- TRUE
} else {
oldformBILOGprior <- FALSE
}
}
message('\nestimating oldForm (Y) parameters')
if(itemtype == '3PL' && oldformBILOGprior == T){
message('with traditional MMLE/EM approach')
oldFormModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(oldformYData),'\n',
'PRIOR = (1-',ncol(oldformYData),', a1, lnorm, 1, 1.6487), ', '(1-',ncol(oldformYData),', g, norm, .22, .08)'))
try(oldFormModel <- mirt::mirt(data = oldformYData, model = oldFormModelSyntax, itemtype = itemtype, SE = T, accelerate = 'squarem'))
} else { # try to search priors automatically. if it fail, try to bayesian approaches
message('with estimate prior distribution using an empirical histogram approach. please be patient.')
try(oldFormModel <- mirt::mirt(data = oldformYData, model = 1, itemtype = itemtype, SE = T, accelerate = 'squarem', empiricalhist = T, technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(tryFitwholeOldItems == T){
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
try(rm(oldFormModel))
try(oldFormModel <- mirt::mirt(data = oldformYDataK, 1, itemtype = itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
try(rm(oldFormModel))
while (!exists('oldFormModel')) {
try(oldFormModel <- mirt::mirt(data = oldformYDataK, 1, itemtype = itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), GenRandomPars = F))
}
}
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by normal MMLE/EM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, forceNormalEM = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by MMLE/QMCEM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, unstable = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by MMLE/MHRM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, forceMHRM = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
stop('Estimation failed. Please check test quality.')
}
}
if(!is.data.frame(newformXData) && !is.matrix(newformXData)){ # if Data is mirt model
newFormModel <- newformXData
newformXDataK <- data.frame(newFormModel@Data$data)
} else {
newformXDataK <- newformXData
if(itemtype == '3PL' && length(newformBILOGprior) == 0){
checknewformBILOGprior <- function()
{
n <- readline(prompt="Do you want to use default BILOG-MG priors for newform Data? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(checknewformBILOGprior())
}
return(as.integer(n))
}
newformBILOGprior <- checknewformBILOGprior()
if(newformBILOGprior == 1){
newformBILOGprior <- TRUE
} else {
newformBILOGprior <- FALSE
}
}
message('\nestimating newForm (X) parameters')
if(itemtype == '3PL' && newformBILOGprior == T){
message('with traditional MMLE/EM approach')
newFormModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXData),'\n',
'PRIOR = (1-',ncol(newformXData),', a1, lnorm, 1, 1.6487), ', '(1-',ncol(newformXData),', g, norm, .22, .08)'))
try(newFormModel <- mirt::mirt(data = newformXData, model = newFormModelSyntax, itemtype = itemtype, SE = T, accelerate = 'squarem'))
} else {
message('with estimate prior distribution using an empirical histogram approach. please be patient.')
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, empiricalhist = T, accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if (tryFitwholeNewItems) {
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
try(rm(newFormModel))
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
try(rm(newFormModel))
while (!exists('newFormModel')) {
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), GenRandomPars = F))
}
}
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by normal MMLE/EM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, forceNormalEM = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by MMLE/QMCEM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, unstable = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by MMLE/MHRM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, forceMHRM = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
stop('Estimation failed. Please check test quality.')
}
}
# do FIPC
NewScaleParms <- mirt::mod2values(newFormModel)
OldScaleParms <- mirt::mod2values(oldFormModel)
if(!parameterOverwrite){
NewScaleParms[, "est"] <- TRUE
OldScaleParms[, "est"] <- TRUE
}
NewScaleParms[which(NewScaleParms$item == paste0('GROUP')), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$item == paste0('GROUP')), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "COV_11"), "est"] <- TRUE
OldScaleParms[which(OldScaleParms$name == "COV_11"), "est"] <- TRUE
if(itemtype == 'Rasch'){
NewScaleParms[which(NewScaleParms$name == "a1"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "a1"), "est"] <- FALSE
}
#IPD
if(checkIPD == T){
# config
IPDgroup <- as.factor(c(rep('oldForm', nrow(oldformYDataK)), rep('newForm', nrow(newformXDataK))))
IPDItemCount <- 0
IPDItemNamesOldForm <- vector()
IPDItemNamesNewForm <- vector()
# IPD target item checking
for(i in 1:length(oldformCommonItemNames)){
if((length(grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))) == 1) == TRUE && (length(grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))) == 1) == TRUE){
IPDItemCount <- IPDItemCount + 1
IPDItemNamesOldForm[IPDItemCount] <- names(oldformYDataK[oldformCommonItemNames[i]])
IPDItemNamesNewForm[IPDItemCount] <- names(newformXDataK[newformCommonItemNames[i]])
} else {
}
}
# IPD Data generation
IPDItemList <- data.frame(rbind(IPDItemNamesOldForm, IPDItemNamesNewForm))
IPDData <- data.frame(matrix(nrow = length(IPDgroup), ncol = IPDItemCount))
colnames(IPDData) <- paste0('X', 1:IPDItemCount)
print(IPDItemNamesOldForm)
print(IPDItemNamesNewForm)
IPDData[1:nrow(oldformYDataK),] <- oldformYDataK[,IPDItemNamesOldForm]
IPDData[nrow(oldformYDataK)+1:nrow(newformXDataK),] <- newformXDataK[,IPDItemNamesNewForm]
# IPD estimation
IPDParmNames <- OldScaleParms$name
IPDParmNames <- IPDParmNames[!duplicated(IPDParmNames)]
IPDParmNames <- IPDParmNames[-c(grep("^MEAN", IPDParmNames), grep("^COV", IPDParmNames), grep("^ak", IPDParmNames), grep("^d0$", IPDParmNames))]
IPDParmNames <- as.character(IPDParmNames)
mirt::mirtCluster()
message('Discovering IPD')
if(itemtype == 'nominal' | tryEM == T){
if(empiricalhist == T){
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'EM', invariance = c(names(IPDData), 'free_means', 'free_var'), empiricalhist = T, technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'EM', empiricalhist = T, technical = list(NCYCLES = 1e+5)))
} else {
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'EM', invariance = c(names(IPDData), 'free_means', 'free_var'), empiricalhist = F, technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'EM', empiricalhist = F, technical = list(NCYCLES = 1e+5)))
}
} else {
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'MHRM', invariance = c(names(IPDData), 'free_means', 'free_var'), technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'MHRM', technical = list(NCYCLES = 1e+5)))
}
mirt::mirtCluster(remove = T)
if(exists('modIPD_DIF')){
modIPD_IPDItem <- names(modIPD_DIF)
CommonItemList_NOIPD <- colnames(IPDData)[!colnames(IPDData) %in% modIPD_IPDItem]
print(modIPD_DIF)
print(CommonItemList_NOIPD)
ActualoldFormCommonItem <- vector(length = length(CommonItemList_NOIPD))
ActualnewFormCommonItem <- vector(length = length(CommonItemList_NOIPD))
for(i in 1:length(CommonItemList_NOIPD)){
ActualoldFormCommonItem[i] <- as.character(IPDItemList[CommonItemList_NOIPD][1,i])
ActualnewFormCommonItem[i] <- as.character(IPDItemList[CommonItemList_NOIPD][2,i])
}
message('ActualoldFormCommonItem: ', ActualoldFormCommonItem)
message('ActualnewFormCommonItem: ', ActualnewFormCommonItem)
oldformCommonItemNames <- ActualoldFormCommonItem
newformCommonItemNames <- ActualnewFormCommonItem
message('oldformCommonItemNames: ', ActualoldFormCommonItem)
message('newformCommonItemNames: ', ActualnewFormCommonItem)
} else {
message('No IPD detected')
}
}
for(i in 1:length(oldformCommonItemNames)){
if((length(grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))) == 1) == TRUE && (length(grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))) == 1) == TRUE && (length(levels(as.factor(newFormModel@Data$data[,grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))]))) == length(levels(as.factor(oldFormModel@Data$data[,grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))]))))){
message('applying ', paste0(newformCommonItemNames[i]), ' <<< ', paste0(oldformCommonItemNames[i]), ' as common item use')
message(' Newform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"], ' '))
message(' Oldform Parms: ', paste0(OldScaleParms[which(OldScaleParms$item == paste0(oldformCommonItemNames[i])), "value"], ' '))
NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"] <- OldScaleParms[which(OldScaleParms$item == paste0(oldformCommonItemNames[i])), "value"]
message(' Linkedform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"], ' '), '\n')
NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "est"] <- FALSE
} else {
message('skipping ', paste0(newformCommonItemNames[i]), ' <<< ', paste0(oldformCommonItemNames[i]), ' as common item use')
}
}
if(length(attr(newFormModel@ParObjects$lrPars, 'parnum')) != 0 && length(attr(oldFormModel@ParObjects$lrPars, 'parnum')) != 0){
NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "value"] <- OldScaleParms[which(OldScaleParms$item == paste0('BETA')), "value"]
NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "est"] <- FALSE
message('applying BETA parameter as linking')
message(' Linkedform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "value"], ' '), '\n')
betaFormula <- attr(newFormModel@ParObjects$lrPars, 'formula')[[1]]
betaCOVdata <- attr(newFormModel@ParObjects$lrPars, 'df')
betaSE <- FALSE
betaEmpiricalhist <- FALSE
} else if(empiricalhist == F){
betaFormula <- NULL
betaCOVdata <- NULL
betaSE <- TRUE
betaEmpiricalhist <- FALSE
} else {
betaFormula <- NULL
betaCOVdata <- NULL
betaSE <- TRUE
betaEmpiricalhist <- TRUE
}
message('\nestimating Linked Form Eq(X) parameters')
if(forceNormalZeroOne){
freeMEAN <- F
NewScaleParms[which(NewScaleParms$name == "COV_11"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "COV_11"), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "MEAN_11"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "MEAN_11"), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "COV_11"), "value"] <- 1
OldScaleParms[which(OldScaleParms$name == "MEAN_11"), "value"] <- 0
}
if(freeMEAN == T){
LinkedModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXDataK[colnames(newFormModel@Data$data)]),'\n',
'MEAN = F1'))
NewScaleParms[which(NewScaleParms$name == "MEAN_1"), "est"] <- TRUE
OldScaleParms[which(OldScaleParms$name == "MEAN_1"), "est"] <- TRUE
} else {
LinkedModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXDataK[colnames(newFormModel@Data$data)]),'\n' ))
}
print(NewScaleParms)
if(itemtype == 'nominal' | tryEM == T){
if(betaEmpiricalhist){
message('with MMLE/EM + empirical histogram approach. please be patient.')
} else {
message('with MMLE/EM approach. please be patient.')
}
if(sum(NewScaleParms$est) == 0){
# LinkedModel <- oldFormModel
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'EM', SE = F, accelerate = 'squarem', empiricalhist = betaEmpiricalhist, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
} else {
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'EM', SE = betaSE, accelerate = 'squarem', empiricalhist = betaEmpiricalhist, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
}
} else {
message('with Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) approach. please be patient.')
if(sum(NewScaleParms$est) == 0){
# LinkedModel <- oldFormModel
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'MHRM', SE = F, accelerate = 'squarem', TOL = .0005, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
} else {
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'MHRM', SE = betaSE, accelerate = 'squarem', TOL = .0005, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
}
}
# if([email protected]$secondordertest){
# message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
#
# rm(LinkedModel)
# try(LinkedModel <- mirt::mirt(data = newformXDataK[colnames([email protected]$data)], LinkedModelSyntax, itemtype = [email protected]$itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), pars = NewScaleParms, GenRandomPars = F))
# }
#
# if([email protected]$secondordertest){
# message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
#
# rm(LinkedModel)
# while (!exists('LinkedModel')) {
# try(LinkedModel <- mirt::mirt(data = newformXDataK[colnames([email protected]$data)], LinkedModelSyntax, itemtype = [email protected]$itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), pars = NewScaleParms, GenRandomPars = T))
# }
# }
# if([email protected]$secondordertest){
# stop('Estimation failed. Please check test quality.')
# }
# calculate expected score
ExpectedScoreOldform <- mirt::expected.test(x = oldFormModel, Theta = fscores(oldFormModel, method = 'MAP'))
ExpectedScoreLinkedform <- mirt::expected.test(x = LinkedModel, Theta = fscores(LinkedModel, method = 'MAP'))
ExpectedScoreNewform <- mirt::expected.test(x = newFormModel, Theta = fscores(newFormModel, method = 'MAP'))
# calculate theta
ThetaOldform <- fscores(oldFormModel, method = 'MAP')
ThetaLinkedform <- fscores(LinkedModel, method = 'MAP')
ThetaNewform <- fscores(newFormModel, method = 'MAP')
# save results as object
modelReturn <- new.env()
modelReturn$oldFormModel <- oldFormModel
modelReturn$newFormModel <- newFormModel
modelReturn$LinkedModel <- LinkedModel
modelReturn$ExpectedScoreOldform <- ExpectedScoreOldform
modelReturn$ExpectedScoreLinkedform <- ExpectedScoreLinkedform
modelReturn$ExpectedScoreNewform <- ExpectedScoreNewform
modelReturn$ThetaOldform <- ThetaOldform
modelReturn$ThetaNewform <- ThetaNewform
modelReturn$ThetaLinkedform <- ThetaLinkedform
if(checkIPD){
modelReturn$IPDData <- data.frame(IPDData, IPDgroup)
if(exists('CommonItemList_NOIPD')){
modelReturn$IPDCommonItemList <- IPDItemList[CommonItemList_NOIPD]
}
}
return(as.list(modelReturn))
}
seonghobae/k.aefa documentation built on Sept. 10, 2017, 12:25 a.m.
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source('https://raw.githubusercontent.com/seonghobae/k.aefa/master/k.aefa3.R')
autoFIPC <- function(newformXData = ..., oldformYData = ..., newformCommonItemNames = ..., oldformCommonItemNames = ..., itemtype = '3PL', newformBILOGprior = NULL, oldformBILOGprior = NULL, tryFitwholeNewItems = T, tryFitwholeOldItems = T, checkIPD = T, tryEM = T, freeMEAN = T, forceNormalZeroOne = F, parameterOverwrite = F, empiricalhist = F, ...){
# print credits
message('automated Fixed Item Parameter Calibration: aFIPC 0.2')
message('Seongho Bae ([email protected])\n')
try(invisible(gc()), silent = T) # garbage cleaning
# checking configure
if(length(newformCommonItemNames) != length(oldformCommonItemNames)){
stop('Common Items are not equal')
}
if(length(newformCommonItemNames) == 0 | length(oldformCommonItemNames) == 0){
stop('Please provide common item names')
}
# checking common items
message('Checking correspond common item names')
to <- rep("<<<", length(newformCommonItemNames))
print(data.frame(cbind(newformCommonItemNames, to, oldformCommonItemNames)))
correspondItems <- data.frame(cbind(newformCommonItemNames, oldformCommonItemNames))
checkCorrect <- function()
{
n <- readline(prompt="Is it correct? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(checkCorrect())
}
return(as.integer(n))
}
confirm <- checkCorrect()
if(confirm != 1){
stop('Please write down pairs correctly')
}
# estimate models for calibration
if(!is.data.frame(oldformYData) && !is.matrix(oldformYData)){ # if Data is mirt model
oldFormModel <- oldformYData
oldformYDataK <- data.frame(oldFormModel@Data$data)
} else { # if Data is data.frame
oldformYDataK <- oldformYData
if(itemtype == '3PL' && length(oldformBILOGprior) == 0){
checkoldformBILOGprior <- function()
{
n <- readline(prompt="Do you want to use default BILOG-MG priors for oldform Data? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(readinteger())
}
return(as.integer(n))
}
oldformBILOGprior <- checkoldformBILOGprior()
if(oldformBILOGprior == 1){
oldformBILOGprior <- TRUE
} else {
oldformBILOGprior <- FALSE
}
}
message('\nestimating oldForm (Y) parameters')
if(itemtype == '3PL' && oldformBILOGprior == T){
message('with traditional MMLE/EM approach')
oldFormModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(oldformYData),'\n',
'PRIOR = (1-',ncol(oldformYData),', a1, lnorm, 1, 1.6487), ', '(1-',ncol(oldformYData),', g, norm, .22, .08)'))
try(oldFormModel <- mirt::mirt(data = oldformYData, model = oldFormModelSyntax, itemtype = itemtype, SE = T, accelerate = 'squarem'))
} else { # try to search priors automatically. if it fail, try to bayesian approaches
message('with estimate prior distribution using an empirical histogram approach. please be patient.')
try(oldFormModel <- mirt::mirt(data = oldformYData, model = 1, itemtype = itemtype, SE = T, accelerate = 'squarem', empiricalhist = T, technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(tryFitwholeOldItems == T){
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
try(rm(oldFormModel))
try(oldFormModel <- mirt::mirt(data = oldformYDataK, 1, itemtype = itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
try(rm(oldFormModel))
while (!exists('oldFormModel')) {
try(oldFormModel <- mirt::mirt(data = oldformYDataK, 1, itemtype = itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), GenRandomPars = F))
}
}
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by normal MMLE/EM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, forceNormalEM = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by MMLE/QMCEM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, unstable = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics by MMLE/MHRM')
try(rm(oldFormModel))
oldFormModel <- surveyFA(oldformYData, autofix = F, SE = T, forceUIRT = T, forceMHRM = T)
}
if(!oldFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
stop('Estimation failed. Please check test quality.')
}
}
if(!is.data.frame(newformXData) && !is.matrix(newformXData)){ # if Data is mirt model
newFormModel <- newformXData
newformXDataK <- data.frame(newFormModel@Data$data)
} else {
newformXDataK <- newformXData
if(itemtype == '3PL' && length(newformBILOGprior) == 0){
checknewformBILOGprior <- function()
{
n <- readline(prompt="Do you want to use default BILOG-MG priors for newform Data? (1: Yes 2: No) : ")
if(!grepl("^[0-9]+$",n))
{
return(checknewformBILOGprior())
}
return(as.integer(n))
}
newformBILOGprior <- checknewformBILOGprior()
if(newformBILOGprior == 1){
newformBILOGprior <- TRUE
} else {
newformBILOGprior <- FALSE
}
}
message('\nestimating newForm (X) parameters')
if(itemtype == '3PL' && newformBILOGprior == T){
message('with traditional MMLE/EM approach')
newFormModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXData),'\n',
'PRIOR = (1-',ncol(newformXData),', a1, lnorm, 1, 1.6487), ', '(1-',ncol(newformXData),', g, norm, .22, .08)'))
try(newFormModel <- mirt::mirt(data = newformXData, model = newFormModelSyntax, itemtype = itemtype, SE = T, accelerate = 'squarem'))
} else {
message('with estimate prior distribution using an empirical histogram approach. please be patient.')
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, empiricalhist = T, accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if (tryFitwholeNewItems) {
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
try(rm(newFormModel))
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), GenRandomPars = F))
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
try(rm(newFormModel))
while (!exists('newFormModel')) {
try(newFormModel <- mirt::mirt(data = newformXDataK, 1, itemtype = itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), GenRandomPars = F))
}
}
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by normal MMLE/EM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, forceNormalEM = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by MMLE/QMCEM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, unstable = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
message('Estimation failed. trying to remove weird items by itemfit statistics again by MMLE/MHRM')
try(rm(newFormModel))
newFormModel <- surveyFA(newformXData, autofix = F, SE = T, forceUIRT = T, forceMHRM = T)
}
if(!newFormModel@OptimInfo$secondordertest && !itemtype == 'ideal'){
stop('Estimation failed. Please check test quality.')
}
}
# do FIPC
NewScaleParms <- mirt::mod2values(newFormModel)
OldScaleParms <- mirt::mod2values(oldFormModel)
if(!parameterOverwrite){
NewScaleParms[, "est"] <- TRUE
OldScaleParms[, "est"] <- TRUE
}
NewScaleParms[which(NewScaleParms$item == paste0('GROUP')), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$item == paste0('GROUP')), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "COV_11"), "est"] <- TRUE
OldScaleParms[which(OldScaleParms$name == "COV_11"), "est"] <- TRUE
if(itemtype == 'Rasch'){
NewScaleParms[which(NewScaleParms$name == "a1"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "a1"), "est"] <- FALSE
}
#IPD
if(checkIPD == T){
# config
IPDgroup <- as.factor(c(rep('oldForm', nrow(oldformYDataK)), rep('newForm', nrow(newformXDataK))))
IPDItemCount <- 0
IPDItemNamesOldForm <- vector()
IPDItemNamesNewForm <- vector()
# IPD target item checking
for(i in 1:length(oldformCommonItemNames)){
if((length(grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))) == 1) == TRUE && (length(grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))) == 1) == TRUE){
IPDItemCount <- IPDItemCount + 1
IPDItemNamesOldForm[IPDItemCount] <- names(oldformYDataK[oldformCommonItemNames[i]])
IPDItemNamesNewForm[IPDItemCount] <- names(newformXDataK[newformCommonItemNames[i]])
} else {
}
}
# IPD Data generation
IPDItemList <- data.frame(rbind(IPDItemNamesOldForm, IPDItemNamesNewForm))
IPDData <- data.frame(matrix(nrow = length(IPDgroup), ncol = IPDItemCount))
colnames(IPDData) <- paste0('X', 1:IPDItemCount)
print(IPDItemNamesOldForm)
print(IPDItemNamesNewForm)
IPDData[1:nrow(oldformYDataK),] <- oldformYDataK[,IPDItemNamesOldForm]
IPDData[nrow(oldformYDataK)+1:nrow(newformXDataK),] <- newformXDataK[,IPDItemNamesNewForm]
# IPD estimation
IPDParmNames <- OldScaleParms$name
IPDParmNames <- IPDParmNames[!duplicated(IPDParmNames)]
IPDParmNames <- IPDParmNames[-c(grep("^MEAN", IPDParmNames), grep("^COV", IPDParmNames), grep("^ak", IPDParmNames), grep("^d0$", IPDParmNames))]
IPDParmNames <- as.character(IPDParmNames)
mirt::mirtCluster()
message('Discovering IPD')
if(itemtype == 'nominal' | tryEM == T){
if(empiricalhist == T){
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'EM', invariance = c(names(IPDData), 'free_means', 'free_var'), empiricalhist = T, technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'EM', empiricalhist = T, technical = list(NCYCLES = 1e+5)))
} else {
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'EM', invariance = c(names(IPDData), 'free_means', 'free_var'), empiricalhist = F, technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'EM', empiricalhist = F, technical = list(NCYCLES = 1e+5)))
}
} else {
modIPD_MG <- multipleGroup(IPDData, model = 1, group = IPDgroup,
itemtype = itemtype, method = 'MHRM', invariance = c(names(IPDData), 'free_means', 'free_var'), technical = list(NCYCLES = 1e+5, removeEmptyRows=TRUE))
try(modIPD_DIF <- DIF(modIPD_MG, IPDParmNames, scheme = 'drop_sequential', method = 'MHRM', technical = list(NCYCLES = 1e+5)))
}
mirt::mirtCluster(remove = T)
if(exists('modIPD_DIF')){
modIPD_IPDItem <- names(modIPD_DIF)
CommonItemList_NOIPD <- colnames(IPDData)[!colnames(IPDData) %in% modIPD_IPDItem]
print(modIPD_DIF)
print(CommonItemList_NOIPD)
ActualoldFormCommonItem <- vector(length = length(CommonItemList_NOIPD))
ActualnewFormCommonItem <- vector(length = length(CommonItemList_NOIPD))
for(i in 1:length(CommonItemList_NOIPD)){
ActualoldFormCommonItem[i] <- as.character(IPDItemList[CommonItemList_NOIPD][1,i])
ActualnewFormCommonItem[i] <- as.character(IPDItemList[CommonItemList_NOIPD][2,i])
}
message('ActualoldFormCommonItem: ', ActualoldFormCommonItem)
message('ActualnewFormCommonItem: ', ActualnewFormCommonItem)
oldformCommonItemNames <- ActualoldFormCommonItem
newformCommonItemNames <- ActualnewFormCommonItem
message('oldformCommonItemNames: ', ActualoldFormCommonItem)
message('newformCommonItemNames: ', ActualnewFormCommonItem)
} else {
message('No IPD detected')
}
}
for(i in 1:length(oldformCommonItemNames)){
if((length(grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))) == 1) == TRUE && (length(grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))) == 1) == TRUE && (length(levels(as.factor(newFormModel@Data$data[,grep(paste0('^',newformCommonItemNames[i],'$'), colnames(newformXDataK[colnames(newFormModel@Data$data)]))]))) == length(levels(as.factor(oldFormModel@Data$data[,grep(paste0('^',oldformCommonItemNames[i],'$'), colnames(oldformYDataK[colnames(oldFormModel@Data$data)]))]))))){
message('applying ', paste0(newformCommonItemNames[i]), ' <<< ', paste0(oldformCommonItemNames[i]), ' as common item use')
message(' Newform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"], ' '))
message(' Oldform Parms: ', paste0(OldScaleParms[which(OldScaleParms$item == paste0(oldformCommonItemNames[i])), "value"], ' '))
NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"] <- OldScaleParms[which(OldScaleParms$item == paste0(oldformCommonItemNames[i])), "value"]
message(' Linkedform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "value"], ' '), '\n')
NewScaleParms[which(NewScaleParms$item == paste0(newformCommonItemNames[i])), "est"] <- FALSE
} else {
message('skipping ', paste0(newformCommonItemNames[i]), ' <<< ', paste0(oldformCommonItemNames[i]), ' as common item use')
}
}
if(length(attr(newFormModel@ParObjects$lrPars, 'parnum')) != 0 && length(attr(oldFormModel@ParObjects$lrPars, 'parnum')) != 0){
NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "value"] <- OldScaleParms[which(OldScaleParms$item == paste0('BETA')), "value"]
NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "est"] <- FALSE
message('applying BETA parameter as linking')
message(' Linkedform Parms: ', paste0(NewScaleParms[which(NewScaleParms$item == paste0('BETA')), "value"], ' '), '\n')
betaFormula <- attr(newFormModel@ParObjects$lrPars, 'formula')[[1]]
betaCOVdata <- attr(newFormModel@ParObjects$lrPars, 'df')
betaSE <- FALSE
betaEmpiricalhist <- FALSE
} else if(empiricalhist == F){
betaFormula <- NULL
betaCOVdata <- NULL
betaSE <- TRUE
betaEmpiricalhist <- FALSE
} else {
betaFormula <- NULL
betaCOVdata <- NULL
betaSE <- TRUE
betaEmpiricalhist <- TRUE
}
message('\nestimating Linked Form Eq(X) parameters')
if(forceNormalZeroOne){
freeMEAN <- F
NewScaleParms[which(NewScaleParms$name == "COV_11"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "COV_11"), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "MEAN_11"), "est"] <- FALSE
OldScaleParms[which(OldScaleParms$name == "MEAN_11"), "est"] <- FALSE
NewScaleParms[which(NewScaleParms$name == "COV_11"), "value"] <- 1
OldScaleParms[which(OldScaleParms$name == "MEAN_11"), "value"] <- 0
}
if(freeMEAN == T){
LinkedModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXDataK[colnames(newFormModel@Data$data)]),'\n',
'MEAN = F1'))
NewScaleParms[which(NewScaleParms$name == "MEAN_1"), "est"] <- TRUE
OldScaleParms[which(OldScaleParms$name == "MEAN_1"), "est"] <- TRUE
} else {
LinkedModelSyntax <- mirt::mirt.model(paste0('F1 = 1-',ncol(newformXDataK[colnames(newFormModel@Data$data)]),'\n' ))
}
print(NewScaleParms)
if(itemtype == 'nominal' | tryEM == T){
if(betaEmpiricalhist){
message('with MMLE/EM + empirical histogram approach. please be patient.')
} else {
message('with MMLE/EM approach. please be patient.')
}
if(sum(NewScaleParms$est) == 0){
# LinkedModel <- oldFormModel
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'EM', SE = F, accelerate = 'squarem', empiricalhist = betaEmpiricalhist, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
} else {
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'EM', SE = betaSE, accelerate = 'squarem', empiricalhist = betaEmpiricalhist, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
}
} else {
message('with Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) approach. please be patient.')
if(sum(NewScaleParms$est) == 0){
# LinkedModel <- oldFormModel
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'MHRM', SE = F, accelerate = 'squarem', TOL = .0005, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
} else {
LinkedModel <- mirt::mirt(data = newformXDataK[colnames(newFormModel@Data$data)], LinkedModelSyntax, itemtype = newFormModel@Model$itemtype, method = 'MHRM', SE = betaSE, accelerate = 'squarem', TOL = .0005, technical = list(NCYCLES = 1e+6, SEtol = 1e-4, MHRM_SE_draws = 1e+5), pars = NewScaleParms, GenRandomPars = F, covdata = betaCOVdata, formula = betaFormula)
}
}
# if([email protected]$secondordertest){
# message('Estimation failed. estimating new parameters with no prior distribution using quasi-Monte Carlo EM estimation. please be patient.')
#
# rm(LinkedModel)
# try(LinkedModel <- mirt::mirt(data = newformXDataK[colnames([email protected]$data)], LinkedModelSyntax, itemtype = [email protected]$itemtype, SE = T, method = 'QMCEM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5), pars = NewScaleParms, GenRandomPars = F))
# }
#
# if([email protected]$secondordertest){
# message('Estimation failed. estimating new parameters with no prior distribution using Cai\'s (2010) Metropolis-Hastings Robbins-Monro (MHRM) algorithm. please be patient.')
#
# rm(LinkedModel)
# while (!exists('LinkedModel')) {
# try(LinkedModel <- mirt::mirt(data = newformXDataK[colnames([email protected]$data)], LinkedModelSyntax, itemtype = [email protected]$itemtype, SE = T, method = 'MHRM', accelerate = 'squarem', technical = list(NCYCLES = 1e+5, MHRM_SE_draws = 200000), pars = NewScaleParms, GenRandomPars = T))
# }
# }
# if([email protected]$secondordertest){
# stop('Estimation failed. Please check test quality.')
# }
# calculate expected score
ExpectedScoreOldform <- mirt::expected.test(x = oldFormModel, Theta = fscores(oldFormModel, method = 'MAP'))
ExpectedScoreLinkedform <- mirt::expected.test(x = LinkedModel, Theta = fscores(LinkedModel, method = 'MAP'))
ExpectedScoreNewform <- mirt::expected.test(x = newFormModel, Theta = fscores(newFormModel, method = 'MAP'))
# calculate theta
ThetaOldform <- fscores(oldFormModel, method = 'MAP')
ThetaLinkedform <- fscores(LinkedModel, method = 'MAP')
ThetaNewform <- fscores(newFormModel, method = 'MAP')
# save results as object
modelReturn <- new.env()
modelReturn$oldFormModel <- oldFormModel
modelReturn$newFormModel <- newFormModel
modelReturn$LinkedModel <- LinkedModel
modelReturn$ExpectedScoreOldform <- ExpectedScoreOldform
modelReturn$ExpectedScoreLinkedform <- ExpectedScoreLinkedform
modelReturn$ExpectedScoreNewform <- ExpectedScoreNewform
modelReturn$ThetaOldform <- ThetaOldform
modelReturn$ThetaNewform <- ThetaNewform
modelReturn$ThetaLinkedform <- ThetaLinkedform
if(checkIPD){
modelReturn$IPDData <- data.frame(IPDData, IPDgroup)
if(exists('CommonItemList_NOIPD')){
modelReturn$IPDCommonItemList <- IPDItemList[CommonItemList_NOIPD]
}
}
return(as.list(modelReturn))
}
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