Effectsize: R Package for Effect Size Indices and Conversions

effectsize is an R package providing utilities for working with indices of effect size. It supports a wide variety of statistical models and hypothesis tests, allowing computation and conversion between indices such as Cohen's d, r, and odds ratios. The package was authored by Mattan S. Ben‐Shachar and is referenced in a 2020 Journal of Open Source Software publication.

Use Cases

• Calculate standardized effect sizes for statistical models based on the supported model list.
• Convert between different effect size metrics (e.g., Cohen's d to r) based on the conversion utilities.
• Perform meta-analysis by harmonizing effect size indices from diverse studies.
• Report and interpret effect sizes in psychological or social science research based on the provided indices.

Strengths

• Supports a wide variety of statistical models and hypothesis tests.
• Provides conversion between multiple established effect size indices (Cohen's d, r, odds).
• Has a peer-reviewed reference (Ben-Shachar et al., 2020) documenting its methodology.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last update date is unknown; freshness unverified.

Provenance

Source

Mattan S. Ben‐Shachar

Collection Method

Software package development for statistical computation.

Time Range

Publication referenced is from 2020.

Freshness

Last updated date is unknown.

Geography

Global (software tool).