Statistics Blog for Psychology Articles on statistical analysis, research methodology, and tools for psychologists and researchers.
Statistics and methodology guides for research in psychology and the health sciences: how to choose the test, check its assumptions, interpret it and report it in APA 7, with examples in SPSS, R, JASP and jamovi. Here is every published article, by topic.
How to report each test in APA 7 Complete guide: how to report results in APA 7
Every article, by topic Clinical (4 articles) Education (3 articles) Herramientas (1 article) Meta-analysis (8 articles) Methodology (64 articles) Hu and Bentler's Cut-offs in CFA and SEM: What They Mean, How to Report Them and When They Fail You Your Honours Thesis Results Section in Four Weeks: The Eight Paragraphs You Actually Need Writing the statistical analysis plan for a PhD funding application Sample Size for Mediation: Why G*Power Cannot Do It Turning PROCESS macro output into an APA 7 table APA 7 Italics, Decimals and Leading Zeros: The Complete Rule APA 7 Table Notes and Significance Asterisks My Results Are Not Significant: What Now? How to Write Your Results When the Assumptions Are Violated TOST Equivalence Testing: How to Show There Is No Difference Common Method Bias: Harman's Test, Why It No Longer Works and What to Use Instead APA 7 Table 1: What Goes In, and Why Baseline p Values Do Not Defense Questions About Your Statistics (and How to Answer Them) When Your Committee Attacks Your Analysis: What to Say The Week Before Your Viva: What to Revise and What to Let Go How to Read a Results Section and Spot What You Are Being Sold My p Value Is .06: What It Means and What to Write Statistically Significant but Useless (and Non-significant but Large) The Effect Theory Said Would Be There (and Wasn't) What a P-Value Actually Is (and Four Things It Is Not) The n = 30 rule: where it came from and why it is wrong Shapiro-Wilk Is Significant but Your Data Look Normal What Is a Random Effect? Explained Without Formulas Power Analysis for Mixed Models and GLMs: Where G*Power Stops Choosing a Statistical Test: The Three-Question Rule Two Months to Submission and You Can't Code: R, SPSS or jamovi? Can I trust ChatGPT with my statistics? Statistics Solutions and Dissertation Consultancies: How They Work and What to Ask AI Reviewer, Human Statistician or Doing It Yourself: The Real Cost of Each The same Results section, before and after What an automated review catches that your supervisor misses (and the other way round) The statistics that get dental papers rejected Path Analysis: What It Is, When to Use It, and How to Run It Structural Equation Modeling (SEM): A Practical Guide for Psychology and Health Check Your Statistics Before You Submit (Without Reopening the Data) APA 7 Results Section: A Complete Example, Annotated Sentence by Sentence Repeated Measures ANOVA in APA 7: Sphericity and Corrected Degrees of Freedom How to Monitor Scientific Literature (So It Actually Works) The 3 mistakes I see most often before a paper is submitted Previum: What It Flags in Your Paper Before You Submit Thesis Defense Questions: the 12 Your Committee Will Ask (and How to Answer Them) How to Calculate the Sample Size of Your Study (G*Power) Step by Step How to Analyze the Data for Your Thesis: Step-by-Step Guide Thesis Data Analysis Plan: What It Is and a Worked Example ChatGPT and AI for Your Thesis Statistics: What It Can and Cannot Do Is It Ethical to Hire a Statistician for Your Thesis? How Much Does Statistical Analysis for a Thesis Cost? Data Analysis in Psychology: A Guide and When to Outsource It Thesis Mills vs. Statistical Consultant: How to Tell Them Apart A Statistician for Your PhD Thesis: What They Do & How to Choose ChatGPT for Statistical Analysis in Psychology: Honest Guide 2026 Evidence-Based Nursing Research: Complete Guide Latent Class Analysis (LCA): Patient Profiles Step by Step Sociograms in Sport: Analyze Cohesion and Leadership in Teams How to Choose the Right Statistical Test (Decision Tree) How to Write the Method Section of a PhD Thesis (APA 7 Template) How to Respond to Reviewer Comments: Templates + Examples 7 Errors When Interpreting Statistical Results (and How to Avoid Them) Types of Research Design in Psychology: Guide With Comparison Table Reanalyzing Data for Reviewer 2: A Practical Guide Single-Case Designs (N=1): Statistical Analysis Step by Step I² in Meta-Analysis: What 25%, 50% and 75% Really Mean (With a Calculator) 5 Common Statistical Errors in Psychology Theses Why Papers Get Rejected: Desk Rejection and the 12 Causes Modeling (4 articles) Open Science (2 articles) Psychometrics (11 articles) Publication (22 articles) Publishing (2 articles) Research (1 article) Statistics (18 articles) Tools (8 articles) Tutorials (11 articles) Visualization (1 article) Pages that answer one specific question Effect size converters All effect size converters
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