JASP (Jeffreys’s Amazing Statistics Program) is a

free and open-source Free and open-source software (FOSS) is a term used to refer to groups of software consisting of both free software and open-source software where anyone is freely licensed to use, copy, study, and change the software in any way, and the source ...

program for

statistical Statistics (from German: ''Statistik'', "description of a state, a country") is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data. In applying statistics to a scientific, industria ...

analysis supported by the

University of Amsterdam The University of Amsterdam (abbreviated as UvA, nl, Universiteit van Amsterdam) is a public research university located in Amsterdam, Netherlands. The UvA is one of two large, publicly funded research universities in the city, the other being ...

. It is designed to be easy to use, and familiar to users of

SPSS SPSS Statistics is a statistical software suite developed by IBM for data management, advanced analytics, multivariate analysis, business intelligence, and criminal investigation. Long produced by SPSS Inc., it was acquired by IBM in 2009. C ...

. It offers standard analysis procedures in both their classical and Bayesian form. JASP generally produces

APA style APA style (also known as APA format) is a writing style and format for academic documents such as scholarly journal articles and books. It is commonly used for citing sources within the field of behavioral and social sciences, including sociol ...

results tables and plots to ease publication. It promotes open science by integration with the

Open Science Framework The Center for Open Science is a non-profit technology organization based in Charlottesville, Virginia with a mission to "increase the openness, integrity, and reproducibility of scientific research." Brian Nosek and Jeffrey Spies founded the or ...

and

reproducibility Reproducibility, also known as replicability and repeatability, is a major principle underpinning the scientific method. For the findings of a study to be reproducible means that results obtained by an experiment or an observational study or in a ...

by integrating the analysis settings into the results. The development of JASP is financially supported b
several universities and research funds
JASP

Analyses

JASP offers frequentist inference and Bayesian inference on the same statistical models.

Frequentist inference Frequentist inference is a type of statistical inference based in frequentist probability, which treats “probability” in equivalent terms to “frequency” and draws conclusions from sample-data by means of emphasizing the frequency or pro ...

uses

p-values In null-hypothesis significance testing, the ''p''-value is the probability of obtaining test results at least as extreme as the result actually observed, under the assumption that the null hypothesis is correct. A very small ''p''-value means ...

and

confidence intervals In frequentist statistics, a confidence interval (CI) is a range of estimates for an unknown parameter. A confidence interval is computed at a designated ''confidence level''; the 95% confidence level is most common, but other levels, such as 9 ...

to control error rates in the limit of infinite perfect replications.

Bayesian inference Bayesian inference is a method of statistical inference in which Bayes' theorem is used to update the probability for a hypothesis as more evidence or information becomes available. Bayesian inference is an important technique in statistics, a ...

uses

credible intervals In Bayesian statistics, a credible interval is an interval within which an unobserved parameter value falls with a particular probability. It is an interval in the domain of a posterior probability distribution or a predictive distribution. The ...

and

Bayes factors The Bayes factor is a ratio of two competing statistical models represented by their marginal likelihood, and is used to quantify the support for one model over the other. The models in questions can have a common set of parameters, such as a nul ...

to estimate credible parameter values and model evidence given the available data and prior knowledge. The following analyses are available in JASP:

Other features

Descriptive statistics A descriptive statistic (in the count noun sense) is a summary statistic that quantitatively describes or summarizes features from a collection of information, while descriptive statistics (in the mass noun sense) is the process of using and an ...

. * Assumption checks for all analyses, including

Levene's test In statistics, Levene's test is an inferential statistic used to assess the equality of variances for a variable calculated for two or more groups. Some common statistical procedures assume that variances of the populations from which different sam ...

, the Shapiro–Wilk test, and

Q–Q plot In statistics, a Q–Q plot (quantile-quantile plot) is a probability plot, a graphical method for comparing two probability distributions by plotting their ''quantiles'' against each other. A point on the plot corresponds to one of the qu ...

. * Imports SPSS files and comma-separated files. *

integration. *Data filtering: Use either R code or a drag-and-drop GUI to select cases of interest. *Create columns: Use either R code or a drag-and-drop GUI to create new variables from existing ones. *Copy tables in

LaTeX Latex is an emulsion (stable dispersion) of polymer microparticles in water. Latexes are found in nature, but synthetic latexes are common as well. In nature, latex is found as a milky fluid found in 10% of all flowering plants (angiosperms ...

format. *Plot editing, Raincloud plots. *PDF export of results. *Importing SQL databases (since v0.16.4)

Modules

# Audit: Planning, selection and evaluation of statistical audit samples. # Summary statistics: Bayesian inference from frequentist summary statistics for t-test, regression, and binomial tests. # Bain: Bayesian informative hypotheses evaluation for t-test,

ANOVA Analysis of variance (ANOVA) is a collection of statistical models and their associated estimation procedures (such as the "variation" among and between groups) used to analyze the differences among means. ANOVA was developed by the statistician ...

ANCOVA Analysis of covariance (ANCOVA) is a general linear model which blends ANOVA and regression. ANCOVA evaluates whether the means of a dependent variable (DV) are equal across levels of a categorical independent variable (IV) often called a tre ...

and linear regression. # Network: Network Analysis allows the user to analyze the network structure of variables. # Meta Analysis: 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. #Machine Learning: The machine Learning module contains 19 analyses for supervised an unsupervised learning: #*Regression #*#Boosting Regression #*#Decision Tree Regression #*# K-Nearest Neighbors Regression #*#Neural Network Regression #*#Random Forest Regression #*#Regularized Linear Regression #*#Support Vector Machine Regression #*Classification #*# Boosting Classification #*#Decision Tree Classification #*#K-Nearest Neighbors Classification #*#Neural Network Classification #*#Linear Discriminant Classification #*# Random Forest Classification #*#Support Vector Machine Classification #*Clustering #*# Density-Based Clustering #*#

Fuzzy C-Means Clustering Fuzzy clustering (also referred to as soft clustering or soft ''k''-means) is a form of clustering in which each data point can belong to more than one cluster. Clustering or cluster analysis involves assigning data points to clusters such that ...

#*#

Hierarchical Clustering In data mining and statistics, hierarchical clustering (also called hierarchical cluster analysis or HCA) is a method of cluster analysis that seeks to build a hierarchy of clusters. Strategies for hierarchical clustering generally fall into ...

#*#Neighborhood-based Clustering (i.e., K-Means Clustering, K-Medians clustering, K-Medoids clustering) #*#Random Forest Clustering #SEM: Structural equation modeling. #JAGS module #Discover distributions #Equivalence testing #Cochrane meta-analyses

References

External links

* * {{DEFAULTSORT:JASP Free Bayesian statistics software Free educational software Free statistical software Software using the GNU AGPL license