[Bug]: Looping reliability analysis

[DSWestbeek]

JASP Version

0.95.0

Commit ID

c4045c3cd65cb374145aac47e69d59c7f90b67bb

JASP Module

Reliability

What analysis are you seeing the problem on?

Unidimensional reliability analysis (classical)

What OS are you seeing the problem on?

macOS Silicon

Bug Description

I started a Unidimensional reliability analysis (classical) with 4 scale variables. By default, coefficient omega is computed and this worked as expected. I checked the box for computing coefficient alfa and deselected the box for omega, after which the analysis kept looping: I could see the loading icon next to the analysis but no result was shown in the table even after an hour of running. I also did not see an error message while looping. The same happened for me with Guttman's labda2. After switching to a bootstrapped interval instead of an analytic interval under the Advanced Options, the computation of the coefficients could finish. The problem does not seem to be system-dependent, as colleagues were able to reproduce my issue on Windows as well as Linux.

Expected Behaviour

I expected to see a table with computed coefficients after JASP finished calculated them.

Steps to Reproduce

1. I loaded my dataset (

Decathlon.csv

) in JASP and opened a unidimensional reliability analysis (classical) from the reliability module.
2. I selected 4 scale variables (polevault, hurdles, longjump, highjump).
3. I checked the box for computing coefficient omega and unchecked the one for coefficient alfa. After this, the computation started (I saw the looping icon) but could not finish.

Log (if any)

No response

More Debug Information

-------- Application Info --------
JASP Version: JASP 0.95 (Apple Silicon)
Build Branch: development
Build Date: Jul 24 2025 12:32:20 (Netherlands)
Last Commit: c4045c3cd65cb374145aac47e69d59c7f90b67bb

-------- Basic Info --------
Operating System: macOS Sequoia (15.6)
Product Version: 15.6
Kernel Type: darwin
Kernel Version: 24.6.0
Architecture: arm64
Install Path: /Applications/JASP.app/Contents/MacOS
Platfotm Name: cocoa
System Local: en_NL

Final Checklist

• I have included a screenshot showcasing the issue, if possible.
• I have included a JASP file (zipped) or data file that causes the crash/bug, if applicable.
• I have accurately described the bug, and steps to reproduce it.

[juliuspfadt]

@DSWestbeek thanks for creating the issue. I see the same thing. It does seem to be related to the data given that other data sets yield results, but still, seems like the confidence interval calculation is running into some problems there. I will have to dig deeper.

[juliuspfadt]

Fixed in the upcoming version. See the linked PR for details :)

[DSWestbeek]

Thank you for looking into it!