Software

JASP vs Jamovi vs SPSS for Your Thesis: The Complete Comparison

Q: Does it matter which software I use for my thesis?

For the statistics itself, no - all three tools produce equivalent results for standard analyses. What matters is that you state which software you used in your methods section (name + version). The choice only matters practically: your access, your learning curve, and your supervisor's expectations.

Q: Will my supervisor accept JASP or Jamovi output?

In most cases, yes. Both tools are used in peer-reviewed research. State the software and version in your methods section. JASP and Jamovi typically produce cleaner APA-formatted output than SPSS does by default.

Q: Can I run the same analysis in both JASP and SPSS to verify?

Yes, and it is a useful cross-check. The test statistics (t, F, chi-square) and p-values should match. Minor decimal-place differences are normal due to rounding. If results differ substantially, check that the same data and options (equal vs. unequal variances, for example) were used in both.

Q: What is a Bayes Factor in JASP and should I report it?

A Bayes Factor (BF₁₀) quantifies evidence for the alternative hypothesis relative to the null. BF₁₀ > 3 = moderate evidence, > 10 = strong evidence. Only report Bayes Factors if your thesis explicitly uses a Bayesian framework - most standard theses report frequentist results (p-values). Do not add Bayes Factors if your theoretical framework is frequentist.

April 20264 min read

SPSS is the established standard. JASP and Jamovi are free, modern, and increasingly adopted in universities. But 'free' does not mean 'equivalent' - each tool has real differences in test coverage, output format, learning curve, and supervisor acceptance. This guide compares all three across every dimension a thesis student cares about, so you choose once and spend your time on analysis, not on learning new software.

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Key takeaways

JASP and Jamovi: both produce fully APA-formatted tables - copy directly into Word, no manual formatting.
JASP is the only free GUI tool with built-in Bayesian analysis - essential for psychology Bayesian theses.
Jamovi: closest interface to SPSS - the fastest transition if you already know SPSS.
< 4 weeks to deadline with no SPSS: choose Jamovi - lowest learning curve of any free alternative.
Always state software name and version in your methods section - this applies to SPSS, JASP, and Jamovi equally.

Quick Comparison: SPSS vs JASP vs Jamovi

Here is how the three tools compare on the most important practical factors for thesis students.

Factor	SPSS	JASP	Jamovi
Price	€130–200/yr	Free	Free
Interface	Point-click GUI	Point-click GUI	Point-click GUI
Learning curve	Medium	Low	Low
APA-ready tables	Partial (manual formatting)	Full	Full
Bayesian analysis	No	Yes (built-in)	No
Reproducible syntax	Yes (SPSS syntax)	No	Partial (.omv file)
Best for	Standard analyses	Psychology, Bayes	Social sciences, SPSS switchers
Supervisor familiarity	Very high	Medium	Growing

SPSS: Still the Default, But No Longer the Only Choice

IBM SPSS Statistics is the software most supervisors trained on and the benchmark against which alternatives are measured. Its output is universally recognised.

Strengths:
Maximum supervisor familiarity - your department almost certainly knows SPSS output
Most comprehensive test coverage out of the box
SPSS syntax files create reproducible analysis scripts
Widely available through university site licenses

Weaknesses:
Cost: €130–200/year for a student license; most university licenses expire at graduation
Output is not APA-formatted by default - tables require manual reformatting
Heavier installation and slower startup than JASP or Jamovi

💡

If your university still has an active SPSS license for you, use it - the familiar output removes one source of uncertainty during your defense.

JASP: Best Free Alternative for Psychology and Bayesian Theses

JASP is developed at the University of Amsterdam and designed to be a SPSS replacement that academics trust. Its key differentiator is built-in Bayesian analysis.

Strengths:
Produces fully APA-formatted tables - copy-paste directly into Word
Built-in Bayesian equivalents for every standard frequentist test
Free forever, developed and maintained by university researchers
Covers all thesis tests: t-test, ANOVA, regression, correlation, non-parametric, Chi-square

Weaknesses:
No German-language interface
Bayesian output (Bayes Factors) can confuse beginners and some supervisors
No scripting - analysis steps are not programmatically reproducible

Jamovi: Easiest Transition From SPSS

Jamovi runs R in the background but presents it as a point-click interface almost identical to SPSS. This makes it the fastest onboarding for students who know SPSS but need a free alternative.

Strengths:
Most SPSS-like interface of any free alternative
Fully APA-formatted output tables
Module ecosystem (jpower, flexplot, GAMLj) extends capabilities
Open-source - free for any use after graduation

Weaknesses:
Partial German translation - some menus remain in English
No built-in Bayesian analysis
Smaller community than R for advanced custom analyses

💡

If you learned SPSS in your methods course, Jamovi will feel immediately familiar. You can run your first t-test in under 5 minutes.

Which Tool for Which Thesis Situation?

Use this table to match your situation to the right software choice.

Your Situation	Best Choice	Why
University SPSS license still active	SPSS	No learning curve, maximum supervisor familiarity
Deadline < 4 weeks, no SPSS	Jamovi	Fastest SPSS-like onboarding
Psychology thesis, APA focus	JASP	Best APA output tables, Bayesian option
Bayesian analysis required	JASP	Only free GUI tool with built-in Bayesian
Business / economics thesis	Jamovi or SPSS	Standard regression, factor analysis covered
Methodology-focused master thesis	R via RStudio	Reproducibility, full statistical flexibility
Education / social work	Jamovi	Simple interface, all standard tests covered

Frequently asked questions

Does it matter which software I use for my thesis?

▾

For the statistics itself, no - all three tools produce equivalent results for standard analyses. What matters is that you state which software you used in your methods section (name + version). The choice only matters practically: your access, your learning curve, and your supervisor's expectations.

Will my supervisor accept JASP or Jamovi output?

▾

In most cases, yes. Both tools are used in peer-reviewed research. State the software and version in your methods section. JASP and Jamovi typically produce cleaner APA-formatted output than SPSS does by default.

Can I run the same analysis in both JASP and SPSS to verify?

▾

Yes, and it is a useful cross-check. The test statistics (t, F, chi-square) and p-values should match. Minor decimal-place differences are normal due to rounding. If results differ substantially, check that the same data and options (equal vs. unequal variances, for example) were used in both.

What is a Bayes Factor in JASP and should I report it?

▾

A Bayes Factor (BF₁₀) quantifies evidence for the alternative hypothesis relative to the null. BF₁₀ > 3 = moderate evidence, > 10 = strong evidence. Only report Bayes Factors if your thesis explicitly uses a Bayesian framework - most standard theses report frequentist results (p-values). Do not add Bayes Factors if your theoretical framework is frequentist.

Is Jamovi free for commercial use after graduation?

▾

Yes. Jamovi is open-source (GPL v3) and free for any use - academic or commercial. JASP is similarly open-source. Neither requires a license at graduation, unlike SPSS.

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Statoria Team

Statistics educators & software developers

We build Statoria to help bachelor and master students get through their thesis data analysis without stress. Our guides are written by researchers with experience in social science statistics and student supervision.

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