Cusp-Catastrophe Model Fitting Using Maximum Likelihood R package cusp version 2.3.8 Cobb's maximum likelihood method for cusp-catastrophe modeling (Grasman, van der Maas, and Wagenmakers (2009) <doi:10.18637/jss.v032.i08>; Cobb (1981), Behavioral Science, 26(1), 75-78). Includes a cusp() function for model fitting, and several utility functions for plotting, and for comparing the model to linear regression and logistic curve models. Software Imports: stats, graphics, grDevices, utils Suggests: plot3D Raoul P. P. P. Grasman <rgrasman@uva.nl> Comprehensive R Archive Network (CRAN) Raoul P. P. P. Grasman [aut, cre, cph] (ORCID: <https://orcid.org/0000-0001-7458-1272>) GPL-2 2024-08-17 application/tgz https://CRAN.R-project.org/package=cusp doi:10.32614/CRAN.package.cusp