R-universe - metinbulus (Metin Bulus)

pwrss - Statistical Power, Sample Size, and Detectable Effect Calculations

Flexible and comprehensive functions for statistical power, minimum required sample size, and minimum detectable effect calculations across a wide range of commonly used hypothesis tests in psychological, biomedical, and social sciences.

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6.55 score 2 stars 103 scripts 1.6k downloads

cosa - Bound Constrained Optimal Sample Size Allocation

Implements bound constrained optimal sample size allocation (BCOSSA) framework described in Bulus & Dong (2021) <doi:10.1080/00220973.2019.1636197> for power analysis of multilevel regression discontinuity designs (MRDDs) and multilevel randomized trials (MRTs) with continuous outcomes. Minimum detectable effect size (MDES) and power computations for MRDDs allow polynomial functional form specification for the score variable (with or without interaction with the treatment indicator) (Bulus, in press).

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3.90 score 16 scripts 362 downloads

irtDemo - Item Response Theory Demo Collection

Includes a collection of shiny applications to demonstrate or to explore fundamental item response theory (IRT) concepts such as estimation, scoring, and multidimensional IRT models.

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2.70 score 2 scripts 293 downloads