rcrtan (version 0.1.1)

item_phi: Calculate Item Phi

Description

Calculate Item Phi

Usage

item_phi(data, items, cut_score, scale = "raw")

Arguments

data

A data frame of dichotomously scored test times

items

Raw column indices representing the test items

cut_score

A raw or percentage cut-score

scale

A character vector indicating whether the cut-score is 'raw' (default) or 'percent'

Value

Phi Item Phi values for items on the test

Examples

# NOT RUN {
item_phi(bh_depend, 2:31, 21, scale = 'raw')
# }