Seeds do not reproduce my results...

eniseg2

Hello dear JASP team!

I've been experimenting with setting seeds for Bayesian analyses. I've set my seed in one data file, and then created another JASP file with the very same data. I re-ran the analyses with the very same seed and got different results - some of my Bayes factors have changed by as much as six! Is this something to worry about?

Kind regards,

Anna

EJ

This is strange -- I'll make some enquiries

E.J.

František

Hi Anna,

thank you very much for contacting us. Could you please describe what specific analysis lead to different results after re-running it with a specified seed?

Cheers,

Frantisek

eniseg2

Hi Frantisek!

These were repeated-measures analyses of covariance. Essentially, I had one JASP file full of analyses and I was struggling to wrap my head around what would be the best analytical approach to choose. Eventually, I settled and wanted to have one neat and tidy file, but keep the untidy file. So I opened the very same data set in JASP in a fresh file, entered the analyses with the same seed and voilà, different results...

Cheers,

Anna

František

Hi Anna,

thanks for the quick response. I tried to reproduce your finding using our test datasets but I did not manage to do so. Could I ask you to save the .JASP file from the analyses as well as a screenshot that marks the results that changed, so I can re-run it on my computer? It would greatly help me in solving this issue.

You can send me the files and screenshot at f.bartos96@gmail.com. I won't share the .JASP file or the screenshot with anyone else.

Cheers,

Frantisek

eniseg2

Hi Frantisek,

I'm sorry, I just saw this. I will email you over the course of the next few days.

Best,

Anna

František

Hi Anna,

no problem, looking forward to your email.

Cheers,

Frantisek