Modelling Tri-Phasic Concentration-Response Relationships R package stressaddition version 3.1.0 The stress addition approach is an alternative to the traditional concentration addition or effect addition models. It allows the modelling of tri-phasic concentration-response relationships either as single toxicant experiments, in combination with an environmental stressor or as mixtures of two toxicants. See Liess et al. (2019) <doi:10.1038/s41598-019-51645-4> and Liess et al. (2020) <doi:10.1186/s12302-020-00394-7>. Software Depends: R (>= 3.5) Imports: drc (>= 3.0), plotrix Suggests: testthat (>= 2.1.0) Sebastian Henz <bastihz.dev@posteo.de> Comprehensive R Archive Network (CRAN) Sebastian Henz [aut, cre] (ORCID: <https://orcid.org/0000-0001-8299-8852>), Matthias Liess [aut] (ORCID: <https://orcid.org/0000-0002-3321-8909>), Naeem Shahid [ctb] (ORCID: <https://orcid.org/0000-0001-6581-1654>), Helmholtz-Zentrum fuer Umweltforschung GmbH - UFZ [cph, fnd] GPL-3 2020-11-03 application/tgz https://CRAN.R-project.org/package=stressaddition doi:10.32614/CRAN.package.stressaddition