Decentralized Unequivocality in Psychological Science R package psyverse version 0.2.6 The constructs used to study the human psychology have many definitions and corresponding instructions for eliciting and coding qualitative data pertaining to constructs' content and for measuring the constructs. This plethora of definitions and instructions necessitates unequivocal reference to specific definitions and instructions in empirical and secondary research. This package implements a human- and machine-readable standard for specifying construct definitions and instructions for measurement and qualitative research based on 'YAML'. This standard facilitates systematic unequivocal reference to specific construct definitions and corresponding instructions in a decentralized manner (i.e. without requiring central curation; Peters (2020) <doi:10.31234/osf.io/xebhn>). Software Depends: R (>= 3.0.0) Imports: stats (>= 3.0.0), yaml (>= 2.1.19), yum (>= 0.0.1) Suggests: covr, DiagrammeR (>= 1.0.0), haven, googlesheets4, knitr, openxlsx, readxl, rmarkdown, rstudioapi, testthat, writexl, XLConnect Gjalt-Jorn Peters <psyverse@opens.science> Comprehensive R Archive Network (CRAN) Gjalt-Jorn Peters [aut, cre, ctb] (ORCID: <https://orcid.org/0000-0002-0336-9589>), Rik Crutzen [ctb] (ORCID: <https://orcid.org/0000-0002-3731-6610>) GPL (>= 3) 2023-03-05 application/tgz https://CRAN.R-project.org/package=psyverse doi:10.32614/CRAN.package.psyverse