In the PCA context (only) certain settings are recommended that cannot be recreated in JASP
Purpose
improved PCA with varimax
Use-case
PCA
Is your feature request related to a problem?
currently parameters cannot be adjusted
Is your feature request related to a JASP module?
Factor
Describe the solution you would like
give users more flexibility
Describe alternatives that you have considered
No response
Additional context
From
Weide, A. C., & Beauducel, A. (2019). Varimax Rotation Based on Gradient Projection Is a Feasible Alternative to SPSS. Frontiers in Psychology, 10. https://doi.org/10.3389/fpsyg.2019.00645
"Users of GPR-Varimax should allow for at least 250 iterations, normalize loadings before rotation, and select the best solution from at least 10 random starts to ensure optimal results"
Note: Psych::fa does have similar arguments so it it should be possible to implement this?
Psych fa uses the GPArotation packacge for many of the algorithms so I think it should go in the help file?
Bernaards, C. A., and Jennrich, R. I. (2005). Gradient projection algorithms and software for arbitrary rotation criteria in factor analysis. Educ. Psychol. Meas. 65, 676–696. doi: 10.1177/0013164404272507
Description
In the PCA context (only) certain settings are recommended that cannot be recreated in JASP
Purpose
improved PCA with varimax
Use-case
PCA
Is your feature request related to a problem?
currently parameters cannot be adjusted
Is your feature request related to a JASP module?
Factor
Describe the solution you would like
give users more flexibility
Describe alternatives that you have considered
No response
Additional context
From
Weide, A. C., & Beauducel, A. (2019). Varimax Rotation Based on Gradient Projection Is a Feasible Alternative to SPSS. Frontiers in Psychology, 10. https://doi.org/10.3389/fpsyg.2019.00645
"Users of GPR-Varimax should allow for at least 250 iterations, normalize loadings before rotation, and select the best solution from at least 10 random starts to ensure optimal results"
Note: Psych::fa does have similar arguments so it it should be possible to implement this?
Psych fa uses the GPArotation packacge for many of the algorithms so I think it should go in the help file?
Bernaards, C. A., and Jennrich, R. I. (2005). Gradient projection algorithms and software for arbitrary rotation criteria in factor analysis. Educ. Psychol. Meas. 65, 676–696. doi: 10.1177/0013164404272507