[Bug]: coefficient alpha (if item dropped) leads to: This analysis terminated unexpectedly. Error in A1 %*% M2: requires numeric/complex matrix/vector arguments Stack trace

[ellenjwright]

JASP Version

0.95.3

Commit ID

No response

JASP Module

Reliability

What analysis are you seeing the problem on?

coefficient alpha (and the option coefficient alpha (if item dropped)

What OS are you seeing the problem on?

Windows 10

Bug Description

Expected Behaviour

A table with each of the 10 items in the first column and the coefficient alpha that would be given if each of the items were dropped

Steps to Reproduce

open csri_no_scales.sav
Open reliability>unidimensional reliability
Move the 10 items over
choose coefficient alpha and under options choose coefficient alpha (if item deliete)

Log (if any)

No response

More Debug Information

No response

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]

@ellenjwright thanks for creating the issue, could you share your data, or, a zipped .jasp file showcasing the issue? A quick fix could be to change the way the interval is calculated to bootstrapped under the advanced options.

[ellenjwright]

Sure - attached here?

…

On Mon, Oct 13, 2025 at 9:11 AM Julius Pfadt ***@***.***> wrote: *juliuspfadt* left a comment (jasp-stats/jasp-issues#3801) [github.com] <https://urldefense.com/v3/__https://github.com/jasp-stats/jasp-issues/issues/3801*issuecomment-3397475135__;Iw!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3muwJjdN$> @ellenjwright [github.com] <https://urldefense.com/v3/__https://github.com/ellenjwright__;!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3g5P6q-B$> thanks for creating the issue, could you share your data, or, a zipped .jasp file showcasing the issue? A quick fix could be to change the way the interval is calculated to bootstrapped under the advanced options. — Reply to this email directly, view it on GitHub [github.com] <https://urldefense.com/v3/__https://github.com/jasp-stats/jasp-issues/issues/3801*issuecomment-3397475135__;Iw!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3muwJjdN$>, or unsubscribe [github.com] <https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BYWBJGZJHA5EFBPQ7YKPBFD3XOQGTAVCNFSM6AAAAACJBIOMVGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTGOJXGQ3TKMJTGU__;!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3hVyYZNQ$> . You are receiving this because you were mentioned.Message ID: ***@***.***>

-- Ellen Wright, PhD Pronouns: She, her, hers Associate Professor, Undergraduate Advising Head Psychology Department, MS 062 415 South Street Waltham, MA 02454-9110 781-736-2809 Fax: 781-736-3291 ***@***.*** We live as though the world were as it should be to show it what it can be.

[ellenjwright]

Hmm - I had a sudden thought - is it because the items are defined as ordinal instead of scale? Ellen

…

On Mon, Oct 13, 2025 at 9:11 AM Julius Pfadt ***@***.***> wrote: *juliuspfadt* left a comment (jasp-stats/jasp-issues#3801) [github.com] <https://urldefense.com/v3/__https://github.com/jasp-stats/jasp-issues/issues/3801*issuecomment-3397475135__;Iw!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3muwJjdN$> @ellenjwright [github.com] <https://urldefense.com/v3/__https://github.com/ellenjwright__;!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3g5P6q-B$> thanks for creating the issue, could you share your data, or, a zipped .jasp file showcasing the issue? A quick fix could be to change the way the interval is calculated to bootstrapped under the advanced options. — Reply to this email directly, view it on GitHub [github.com] <https://urldefense.com/v3/__https://github.com/jasp-stats/jasp-issues/issues/3801*issuecomment-3397475135__;Iw!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3muwJjdN$>, or unsubscribe [github.com] <https://urldefense.com/v3/__https://github.com/notifications/unsubscribe-auth/BYWBJGZJHA5EFBPQ7YKPBFD3XOQGTAVCNFSM6AAAAACJBIOMVGVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTGOJXGQ3TKMJTGU__;!!DaRZpAeNFA!aaOZsBxx6wVK777UHF5kwYV6Vvl3czy00dgWX94DDNWQpAlKBTkJGH2Y7baCOpsI5zApIBZtfQ7PA-E5qE3f3hVyYZNQ$> . You are receiving this because you were mentioned.Message ID: ***@***.***>

-- Ellen Wright, PhD Pronouns: She, her, hers Associate Professor, Undergraduate Advising Head Psychology Department, MS 062 415 South Street Waltham, MA 02454-9110 781-736-2809 Fax: 781-736-3291 ***@***.*** We live as though the world were as it should be to show it what it can be.

[juliuspfadt]

Unfortunately, if you reply via email attachments dont work. You need to go to the website :)

[ellenjwright]

sorry! And ignore my last question. I tried changing the data characteristic to scale and I still got the same error

csri.xls
This is the original file without the labels

[ellenjwright]

I am not sure I understand what you are saying here: A quick fix could be to change the way the interval is calculated to bootstrapped under the advanced options.
I'm just asking to check 10 items in terms of how consistent they are. This should be a standard thing, right?

[juliuspfadt]

true, but the interval is always calculated. you find it here:

without knowing which items you chose exactly I cannot recreate the error.