Publications by George

ASD vs. TD DIF

Clean ASD CDI:WS data data_AS_WS <- read.delim("data/ASD CDI data/mci_sentences02.txt", header = TRUE, sep = "\t", dec = ".") %>% filter(mcs_vc_total != "999") # extracting first row as a descriptive dataframe description_WS <- data_AS_WS[1:1,] description_WS <- as.data.frame(t(description_WS)) names(description_WS) <- "description" # what...

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CDI-CAT: French production

Introduction Our primary goal here is to develop and test via simulation a bank of CDI items and IRT parameters that we can recommend to those wanting to develop and conduct CDI computerized adaptive tests (CATs). Our approach is as follows: We first fit basic IRT models (Rasch, 2PL, 3PL, 4PL) to wordbank CDI data (French (French), WS form), and ...

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