About this resource

    Type of resources
    Interactive
    Education level(s)
    College / Upper Division (Undergraduates), Graduate / Professional, Career / Technical, Adult Education
    Primary user(s)
    Student, Teacher, researcher
    Subject area(s)
    Applied Science, Arts and Humanities, Business and Communication, Career and Technical Education, Education, English Language Arts, History, Law, Life Science, Math & Statistics, Social Science
    Language(s)
    English
    Cluster
    Pre-analysis Planning, Conceptual and Statistical Knowledge
    Last updated
    9 November 2026
    Interactive

    Sample Size Justification Shiny App

    By Daniël Lakens

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    Level College / Upper Division (Undergraduates), Graduate / Professional, Career / Technical, Adult Education · For Student, Teacher, researcher · Language English

    Abstract

    This Shiny app accompanies the paper ‘Sample Size Justification’ by Daniël Lakens. You can download the pre-print of this article at PsyArXiV and any sections in this online form that are unclear are explained in the paper. You can help to improve this app by providing feedback or suggest additions by filling out this feedback form . Note that this app will not store the information you enter if you close or refresh you browser. You might want to write down answers in a local text file first. For a completed example, see here .

    The main goal of this app and the accompanying paper is to guide you through an evaluation of the informational value of a planned study. After filling out this form you can download a report of your sample size justification.

    Keywords Sample Size Justification · Study Planning