# R Dataset / Package psych / Gorsuch

On this R-data statistics page, you will find information about the Gorsuch data set which pertains to Example data set from Gorsuch (1997) for an example factor extension.. The Gorsuch data set is found in the psych R package. You can load the Gorsuch data set in R by issuing the following command at the console data("Gorsuch"). This will load the data into a variable called Gorsuch. If R says the Gorsuch data set is not found, you can try installing the package by issuing this command install.packages("psych") and then attempt to reload the data with the library() command. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the Gorsuch R data set. The size of this file is about 638 bytes.

## Example data set from Gorsuch (1997) for an example factor extension.

### Description

Gorsuch (1997) suggests an alternative to the classic Dwyer (1937) factor extension technique. This data set is taken from that article. Useful for comparing `link{fa.extension}`

with and without the correct=TRUE option.

### Usage

data(Gorsuch)

### Details

Gorsuc (1997) suggested an alternative model for factor extension. His method is appropriate for the case of repeated variables. This is handled in `link{fa.extension}`

with correct=FALSE

### Source

Richard L. Gorsuch (1997) New Procedure for Extension Analysis in Exploratory Factor Analysis. Educational and Psychological Measurement, 57, 725-740.

### References

Dwyer, Paul S. (1937), The determination of the factor loadings of a given test from the known factor loadings of other tests. Psychometrika, 3, 173-178

### Examples

data(Gorsuch)Ro <- Gorsuch[1:6,1:6] Roe <- Gorsuch[1:6,7:10] fo <- fa(Ro,2,rotate="none") fa.extension(Roe,fo,correct=FALSE)

Dataset imported from https://www.r-project.org.