Scree plot parallel analysis Eigenvalues
Hi there. I am correct that the Eigenvalues in the JASP's EFA scree plot are the FA (Real data factor eigenvalues); and not the PCA initial Eigenvalues. However, both types of Eigenvalues are available in Output Options > Tables parallel analysis. Would it be possible to include both types of Eigenvalues in the scree plot in the future?
Kind regards,
F
Comments
Hi there. Am I correct that the Eigenvalues in the JASP's EFA scree plot are the FA (Real data factor eigenvalues); and not the PCA initial Eigenvalues? However, both types of Eigenvalues are available in Output Options > Tables parallel analysis. Would it be possible to include both types of Eigenvalues in the scree plot in the future?
Hi Frans,
Yes, but in order to take action it would be great if you could issue a feature request on our GitHub page (for details see https://jasp-stats.org/2018/03/29/request-feature-report-bug-jasp/)
Cheers,
E.J.
Thank you for the confirmation. I'll issue a feature request.
After further exploration, I discovered that it is indeed possible in JASP to switch between scree plots with PC and FA eigenvalues. The scree plot uses the values from the output options > tables parallel analysis. If the analysis is chosen to be based on FA, the scree plot will use the FA eigenvalues. Changing the parallel analysis to be based on PC does, however not automatically change the scree plot. The trick is to first untick the scree plot before selecting it again. The scree plot will then be adjusted according to the values in the table.
Hmm that does sound like a bug we can easily fix -- could you report it on our GitHub page by any chance?
EJ
Will do EJ!