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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.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.