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October 9, 2015 10:02
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| library(irtoys) | |
| hp <- read.csv("http://cddesja.github.io/classes/e411prma2015-3/data/hp.csv", header = T)[,-7] | |
| mod <- est(hp, model="1PL", engine="ltm", rasch = TRUE) | |
| colnames(mod$est) <- c("Discrimination", "Difficulty", "Guessing") | |
| rownames(mod$est) <- paste("Item", 1:ncol(hp)) | |
| print(mod$est) |
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