Stable release
0.18.3[1] Edit this on Wikidata / 12 January 2024; 4 months ago (12 January 2024)
RepositoryJASP Github page
Written inC++, R, JavaScript, QML
Operating systemMicrosoft Windows, Mac OS X, ChromeOS, Linux
LicenseGNU Affero General Public License

JASP (Jeffreys’s Amazing Statistics Program[2]) is a free and open-source program for statistical analysis supported by the University of Amsterdam. It is designed to be easy to use, and familiar to users of SPSS. It offers standard analysis procedures in both their classical and Bayesian form.[3][4] JASP generally produces APA style results tables and plots to ease publication. It promotes open science via integration with the Open Science Framework and reproducibility by integrating the analysis settings into the results. The development of JASP is financially supported by several universities and research funds. As the JASP GUI is developed in C++ using Qt framework, some of the team left to make a notable fork which is Jamovi which has its GUI developed in JavaScript and HTML5.[5]

JASP screenshot


JASP offers frequentist inference and Bayesian inference on the same statistical models. Frequentist inference uses p-values and confidence intervals to control error rates in the limit of infinite perfect replications. Bayesian inference uses credible intervals and Bayes factors[6][7] to estimate credible parameter values and model evidence given the available data and prior knowledge.

The following analyses are available in JASP in comparison to SPSS:

GUI Features (features available via R or SPSS Syntax not listed)
JASP 0.18.2 SPSS 29 JASP 0.18.2 SPSS 29
Analysis Classic Classic Bayesian Bayesian
Acceptance Sampling X
(repeated) (M)AN(C)OVA and non-parametrics (✓) (✓)
Audit - Statistical Methods for Auditing X X
Bain - Bayesian informative hypotheses evaluation X
BSTS - Bayesian structural time series X
Circular / Directional Statistics - analysis of directions, often angles X X X
Cochrane Meta-Analyses X X
Distributions X X
Equivalence T-Tests (TOST): Independent, Paired, One-Sample X X
Factor Analysis (PCA, EFA, CFA) ✓ / AMOS X X
Frequencies (Binomial, Multinomial, Contingency, Chi², log-linear regression) (✓)
JAGS (Bayesian black-box Markov chain Monte Carlo (MCMC) sampler) (AMOS)
Learn Stats (separate Classical & Bayesian module) X X
Machine Learning (incl Cluster & Discriminant Analyses) X X
(Cochrane) Meta-Analysis (PET-PEESE, WAAP-WLS for publication bias correction) X
(Generalized or Linear) Mixed Models X
Network X
Power Analysis / Sample Size Planning (✓) (✓) X X
Prophet / Time Series Forecasting X X
Quality Control (✓) X X
Regression / Correlation (r, Rho, Tau, (log)linear, multinomial, ordinal, firth logistic, residual (✓) (✓)
Reliability (✓) X
Structural Equation Modeling inkl. (PLS) Partial Least Squares, Latent Growth & MIMIC SEM lavaan & PROCESS AMOS & PROCESS X X
Summary Statistics X X X
non-parametric Survival Analyses X X
T-Tests: Independent, Paired, One-Sample (incl. z, Welch, non-parametrics & robust bayesian) (✓)
Visual Modeling: Automated Plotting, (Non-)Linear, Mixed, Generalized Linear X X
An always up to date version of this table is maintained here https://docs.google.com/spreadsheets/d/1lQ7Pt8vFfSrHxQ9Kh3rjY6Ttx2Yx5b1sVKEGLYU9v4Y/edit#gid=0
Sources https://jasp-stats.org/features/ and official IBM SPSS documentation
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Other features


JASP features seven common modules that are enabled by default:

  1. Descriptives: Explore the data with tables and plots.
  2. T-Tests: Evaluate the difference between two means.
  3. ANOVA: Evaluate the difference between multiple means.
  4. Mixed Models: Evaluate the difference between multiple means with random effects.
  5. Regression: Evaluate the association between variables.
  6. Frequencies: Analyses for count data.
  7. Factor: Explore hidden structure in the data.

JASP also features multiple additional modules that can be activated via the module menu:

  1. Acceptance Sampling: Methods for acceptance sampling and a quality control setting.
  2. Audit: Statistical methods for auditing. The audit module offers planning, selection and evaluation of statistical audit samples, methods for data auditing (e.g., Benford’s law) and algorithm auditing (e.g., model fairness).
  3. Bain: Bayesian informative hypotheses evaluation[8] for t-tests, ANOVA, ANCOVA, linear regression and structural equation modeling.
  4. BSTS: Bayesian take on linear Gaussian state space models suitable for time series analysis.
  5. Circular Statistics: Basic methods for directional data.
  6. Cochrane meta-analyses: Analyse Cochrane medical datasets.
  7. Distributions: Visualise probability distributions and fit them to data.
  8. Equivalence T-Tests: Test the difference between two means with an interval-null hypothesis.
  9. JAGS: Implement Bayesian models with the JAGS program for Markov chain Monte Carlo.
  10. Learn Bayes: Learn Bayesian statistics with simple examples and supporting text.
  11. Learn Stats: Learn classical statistics with simple examples and supporting text.
  12. Machine Learning: Explore the relation between variables using data-driven methods for supervised learning and unsupervised learning. The module contains 19 analyses for regression, classification and clustering:
  13. Meta Analysis: Synthesise evidence across multiple studies. Includes techniques for fixed and random effects analysis, fixed and mixed effects meta-regression, forest and funnel plots, tests for funnel plot asymmetry, trim-and-fill and fail-safe N analysis.
  14. Network: Explore the connections between variables organised as a network. Network Analysis allows the user to analyze the network structure.
  15. Power: Conduct power analyses.
  16. Predictive Analytics: This module offers predictive analytics.
  17. Process: Implementation of Hayes' popular SPSS PROCESS module for JASP
  18. Prophet: A simple model for time series prediction.
  19. Quality Control: Investigate if a manufactured product adheres to a defined set of quality criteria.
  20. Reliability: Quantify the reliability of test scores.
  21. Robust T-Tests: Robustly evaluate the difference between two means.
  22. SEM (Structural equation modeling): Evaluate latent data structures with Yves Rosseel's lavaan program.[9]
  23. Summary statistics: Apply common Bayesian tests from frequentist summary statistics for t-test, regression, and binomial tests.
  24. Time Series: Time series analysis.
  25. Visual Modeling: Graphically explore the dependencies between variables.
  26. R Console: Execute R code in a console.


  1. ^ Error: Unable to display the reference properly. See the documentation for details.
  2. ^ "FAQ - JASP". JASP. Retrieved 18 February 2022.
  3. ^ Wagenmakers EJ, Love J, Marsman M, Jamil T, Ly A, Verhagen J, et al. (February 2018). "Bayesian inference for psychology. Part II: Example applications with JASP". Psychonomic Bulletin & Review. 25 (1): 58–76. doi:10.3758/s13423-017-1323-7. PMC 5862926. PMID 28685272.
  4. ^ Love J, Selker R, Verhagen J, Marsman M, Gronau QF, Jamil T, Smira M, Epskamp S, Wil A, Ly A, Matzke D, Wagenmakers EJ, Morey MD, Rouder JN (2015). "Software to Sharpen Your Stats". APS Observer. 28 (3).
  5. ^ "Introducing jamovi: Free and Open Statistical Software Combining Ease of Use with the Power of R". 23 March 2017.
  6. ^ Quintana DS, Williams DR (June 2018). "Bayesian alternatives for common null-hypothesis significance tests in psychiatry: a non-technical guide using JASP". BMC Psychiatry. 18 (1): 178. doi:10.1186/s12888-018-1761-4. PMC 5991426. PMID 29879931.
  7. ^ Brydges CR, Gaeta L (December 2019). "An Introduction to Calculating Bayes Factors in JASP for Speech, Language, and Hearing Research". Journal of Speech, Language, and Hearing Research. 62 (12): 4523–4533. doi:10.1044/2019_JSLHR-H-19-0183. PMID 31830850. S2CID 209342577.
  8. ^ Gu, Xin; Mulder, Joris; Hoijtink, Herbert (2018). "Approximated adjusted fractional Bayes factors: A general method for testing informative hypotheses". British Journal of Mathematical and Statistical Psychology. 71 (2): 229–261. doi:10.1111/bmsp.12110. ISSN 2044-8317. PMID 28857129.
  9. ^ Kline, Rex B. (2015-11-03). Principles and Practice of Structural Equation Modeling, Fourth Edition. Guilford Publications. ISBN 9781462523351.