item_phi: Calculate Item Phi
In gtlaflair/rcrtan: Criterion-Referenced Test Analysis

Calculate Item Phi

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

`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'

Phi Item Phi values for items on the test

1	item_phi(bh_depend, 2:31, 21, scale = 'raw')

gtlaflair/rcrtan documentation built on May 24, 2021, 11:07 a.m.

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