Controlled Psycholinguistic Experiments with Large Language Models R package PsyLingLLM version 0.4.0 Runs controlled psycholinguistic, psychological, cognitive, and educational experiments with large language models. Registry-based configuration separates models, providers, and application programming interfaces so that compatible services can share experimental designs. Functions support randomized and factorial trials, multi-turn conversations, response and reasoning capture, timing and token measurements, and structured result export. For methodological context on using language models as experimental participants, see Dillion et al. (2023) <doi:10.1016/j.tics.2023.04.008>. Software Depends: R (>= 4.0) Imports: curl, writexl, dplyr (>= 1.1.0), tibble (>= 3.2.0), jsonlite (>= 1.8.0), magrittr, yaml, readr, readxl, openxlsx, stringr, stats, utils, stringi Suggests: jsonvalidate, testthat (>= 3.0.0), withr Han Ming <hanmingpsy@gmail.com> Comprehensive R Archive Network (CRAN) Han Ming [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=PsyLingLLM/LICENSE) 2026-11-11 application/tgz https://CRAN.R-project.org/package=PsyLingLLM doi:10.32614/CRAN.package.PsyLingLLM en-US