Software: Learn R

• afex – ANOVA (also mixed models with lme4)
• emmeans – Postestimation tests
• lme4 – Mixed Models
• lavaan – Structural Equation Modeling
• survival – Survival Models
• survey  OR srvyr - Complex Samples

Multi-Purpose

• psych - Many functions for Psychology
• TidyModels - Modeling compatible with the Tidyverse
• easystats - collection of packages for working with models
  • insight - extract information from model objects
  • report - produces APA-style model results in text
  • see - produces relevant ggplot graphics from a model object

Publication-Specific

• gtsummary - create publication-ready analytical and summary tables
  • pander, kable, and stargazer are older alternatives
• equatiomatic - create the equation for a fitted model in LaTeX

Tutorials

• YouTube Channel Simplistics (Quant Psych) -  Eccentric teacher is good at simplifying complex topics.
  • Fast-paced with background music.
  • This large collection covers everything from the basics to mixed models, both theoretically and in R.
• YouTube Channel StatQuest with Josh Starmer "in R" - Various topics in R step-by-step
• Statistics and machine learning (yuzaR Data Science)
  • Multivariable Linear Regression in R (~20 minutes)
• YouTube Channel Global Health & YouTube Channel R Programing 101 - Greg Martin, Medicine / Public Health
  • Has additional free (registration required) and paid resources
• MarinStatsLectures & YouTube Channel- Mike Marin, Statistics / Public Health
  • Videos created for graduate students at The University of British Columbia

Formula Notation Reference

• Formulas (Social Science Computing Cooperative) - Examples of using formulas for plots and analyses up to regression.
• Model Specification (GLMM FAQ by Ben Bolker/lme4) - Specifying  random effects / mixed models in lme4 and nlme