Skip to contents

Score Serial Subtraction Task

Source: R/score_subtraction.R
score_subtraction.Rd

This function scores a serial subtraction task where respondents are scored based on their ability to successfully subtract a specific value (e.g., 7) from the previous value. A score of 1 is given for correct subtraction, and a score of 0 is given for incorrect subtraction. However, a respondent can still receive a score of 1 if they recover from an initial mistake by correctly subtracting later.

Usage

score_subtraction(val, diff)

Arguments

val

A numeric vector representing the respondent's current answer.

diff

A numeric vector representing the correct difference (e.g., expected subtraction value).

Value

A numeric vector where:

  • 1: Correct subtraction.

  • 0: Incorrect subtraction.

  • NA: If the original value is missing (NA), it remains NA.

Details

The function checks if the respondent's answer (val) is equal to the correct subtraction difference (diff). If so, they are awarded a score of 1. If they make a mistake, they get 0. However, if they correct their mistake in the next step, they can receive a score of 1 for that step. Missing values (NA) in the input remain as NA in the output.

Examples

responses <- c(93, 86, 79, 72, NA)
correct_diffs <- c(93, 86, 79, 72, 65) - 7
score_subtraction(responses, correct_diffs)
#> [1]  0  0  0  0 NA