sco function

Score a multiple choice test

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.

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?

Returns

A matrix of responses scored 0=wrong 1=correct, and possibly NA

Examples

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

Author(s)

Ivailo Partchev