JASP, or Jeffrey's Amazing Statistics Program, is a free, multi-platform open-source statistics software developed by researchers at the University of Amsterdam, emphasizing usability and intuitive interfaces for both standard and Bayesian analyses. The program allows easy data manipulation with features like drag-and-drop, real-time computations, and exporting options in various formats, adhering to APA style for tables and plots. Users can customize their experience through preferences, including updating data synchronization, output formatting, and interface themes.

1. Introduction to JASP
Dr. M. Ramakrishnan
Associate Professor of Mathematics,
Ramakrishna Mission Vivekananda College,
Chennai, TamilNadu.
PH: 9543082432, 9381054104
E-mail: mramkey@mramkey.co.in, mramkey@rkmvc.ac.in

2. •JASP stands for Jeffrey’s Amazing Statistics Program in
recognition of the pioneer of Bayesian inference Sir
Harold Jeffreys.
•This is a free multi-platform open-source statistics
package, developed and continually updated by a
group of researchers at the University of Amsterdam.
•JASP is a free, open-source program that includes
both standard and more advanced statistical
techniques with a major emphasis on providing a
simple intuitive user interface supported by the
University of Amsterdam, Netherlands.

3. • 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.
• JASP generally produces APA Style results tables and plots
to ease publication.
• In contrast to many statistical packages, JASP provides a
simple drag and drop interface, easy access menus, intuitive
analysis with real-time computation and display of all results.
• All tables and graphs are presented in APA format and can be
copied directly and/or saved independently.
• Tables can also be exported from JASP in LaTeX format

4. JASP Installation
• JASP can be downloaded free from the website
• https://jasp-stats.org/ and is available for Windows, Mac OS X and
Linux.
• Pre-installed Windows version that will run directly from a USB or
external hard drive without the need to install it locally.
• The JASP application is written in C++ and QML, using the Qt toolkit.
• The analyses themselves are written in R and use many packages from
CRAN.
For Previous versions
• https://jasp-stats.org/previous-versions/
• Comparison of JASP and SPSS
• https://jasp-stats.org/2017/11/01/jasp-vs-spss/

5. Open Data from other Sources
• 1. Create a Data file in excel in .csv or SPSS file .sav format
• 2. In JASP, open these files using
In main Menu Open -> Computer -> Browse enter then
select the file which is to be handle in JASP
• 3. To open already used file Open -> Recent files -> select
JASP or CSV file
• 4. To open sample files given in JASP
Open -> Data Library

6. •Save/Save as: Using these options the data file, any
annotations and the analysis can be saved in the .jasp
format
•Export: Results can be exported to either an HTML file
or as a PDF
•Data can be exported to either a .csv, .tsv or .txt file
• Sync data: Used to synchronize with any updates in
the current data file (also can use Ctrl-Y

7. • In the Data Preferences section users can:
• • Synchronize/update the data automatically when the data file is
saved (default)
• • Set the default spreadsheet editor (i.e. Excel, SPSS etc)
• • Change the threshold so that JASP more readily distinguishes
between nominal and scale data
• • Add a custom missing value code

8. •In the Results Preferences section users can:
•• Set JASP to return exact p values i.e. P=0.00087
rather than P<.001
•• Fix the number of decimals for data in tables –
makes tables easier to read/publish
•• Change the pixel resolution of the graph plots
•• Select when copying graphs whether they have a
white or transparent background

9. • In the Interface Preferences section users can now define a user font
and pick between two different themes; a light theme (default) and a
dark theme. The preferred language currently supports English
• In the Advanced Preferences section, most users will probably never
have to change any of the default settings.
• JASP has a streamlined interface to switch between the spreadsheet,
analysis and results views.
• The vertical bars highlighted above allows for the windows to be
dragged right or left by clicking and dragging the three vertical dots
• The individual windows can also be completely collapsed using the
right or left arrow icons

11. • The Add notes menu provides many options to change text
font, colour size etc. You can change the size of all the tables
and graphs using ctrl+ (increase) ctrl- (decrease) ctrl= (back
to default size).
• Graphs can also be resized by dragging the bottom right
corner of the graph.
• As previously mentioned, all tables and figures are APA
standard and can just be copied into any other document.
• Since all images can be copied/saved with either a white or
transparent background. This can be selected in Preferences
> Advanced as described earlier.