irtoys (version 0.1.4)

sco: Score a multiple choice test

Description

Given a key, score a multiple choice test, i.e. recode the original choices to right (1) or wrong (0). Missing responses are treated as wrong.

Usage

sco(choices, key, na.false=FALSE)

Arguments

choices

The original responses to the items in the test: persons as rows, items as columns. May contain NA.

key

A vector containing the key (correct answers) to the items in choices. If not given, the function will check if all data are either 0, 1, or NA: if yes, NA are recoded as 0, else an error message is returned.

na.false

Recode non-responses to false responses?

Examples

data(Unscored)
res <- sco(Unscored, key=c(2,3,1,1,4,1,2,1,2,3,3,4,3,4,2,2,4,3))