**Create 3D Barplots** (**barplot3d**)

Creates 3D barplots. Includes a function for sequence context plots used in DNA sequencing analysis.

**Distributional Differences Across Contingency Tables** (**DiffXTables**)

Statistical methods for hypothesis testing of differences in the underlying distributions across two or more contingency tables. The package includes three tests: the comparative chi-squared test (Song et al, 2014) <doi:10.1093/nar/gku086> (Zhang et al, 2015) <doi:10.1093/nar/gkv358>, the Sharma-Song test, and the heterogeneity test. They all have an asymptotically chi-squared null distribution. These options allow one to test for patterns that differ in first and second orders, directly related to marginal and joint distributions of given contingency tables.

**Probability Associator Time (PASS-T)** (**passt**)

Simulates judgments of frequency and duration based on the Probability Associator Time (PASS-T) model. PASS-T is a memory model based on a simple competitive artificial neural network. It can imitate human judgments of frequency and duration, which have been extensively studied in cognitive psychology (e.g. Hintzman (1970) <doi:10.1037/h0028865>, Betsch et al. (2010) <https://…/2010-18204-003> ). The PASS-T model is an extension of the PASS model (Sedlmeier, 2002, ISBN:0198508638). The package provides an easy way to run simulations, which can then be compared with empirical data in human judgments of frequency and duration.

**Obtaining and Estimating Unidimensional IRT Dual Models** (**InDisc**)

Performs a unified approach for obtaining and estimating unidimensional Item Response Theory (IRT) Dual Models (DMs), proposed by Ferrando (2019 <doi:10.1177/0146621618817779>).

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