contentValidity 0.1.0

Initial CRAN release.

Item-level indices

• icvi() — Item-level Content Validity Index (Lynn, 1986).
• mod_kappa() — Modified kappa adjusted for chance agreement (Polit, Beck, & Owen, 2007).
• aiken_v() — Aiken’s V coefficient using the full rating scale (Aiken, 1985).

Scale-level indices

• scvi_ave() — Scale-level Content Validity Index, average method (Polit & Beck, 2006).
• scvi_ua() — Scale-level Content Validity Index, universal agreement (Polit & Beck, 2006).

Lawshe’s Content Validity Ratio

• cvr() — Lawshe’s CVR (Lawshe, 1975).
• cvr_critical() — exact-binomial critical CVR values (Wilson, Pan, & Schumsky, 2012).

Reporting and convenience

• content_validity() — wrapper returning all relevance-scale indices in a tidy content_validity object, with a custom print() method.
• apa_table() — publication-ready APA-style tables in data frame, markdown, HTML, or LaTeX format.

Data

• cvi_example — simulated 6-expert by 10-item depression screening ratings for use in examples and the package vignette.