sirt: R2noharm.jackknife – R documentation

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R2noharm.jackknife

Jackknife Estimation of NOHARM Analysis

This function performs a jackknife estimation of NOHARM analysis to get standard errors based on a replication method (see Christoffersson, 1977).

R2noharm.jackknife(object, jackunits=NULL)

## S3 method for class 'R2noharm.jackknife'
summary(object, logfile=NULL, ...)

`object`	Object of class `R2noharm`
`jackunits`	A vector of integers or a number. If it is a number, then it refers to the number of jackknife units. If it is a vector of integers, then this vector defines the allocation of persons jackknife units. Integers corresponds to row indexes in the data set.
`logfile`	File name if the summary should be sunk into a file
`...`	Further arguments to be passed

A list of lists with following entries:

`partable`	Data frame with parameters
`se.pars`	List of estimated standard errors for all parameter estimates: `tanaka.stat`, `rmsr.stat`, `rmsea.stat`, `chisquare_df.stat`, `thresholds.stat`, `final.constants.stat`, `uniquenesses.stat`, `factor.cor.stat`, `loadings.stat`, `loadings.theta.stat`
`jackknife.pars`	List with obtained results by jackknifing for all parameters: `j.tanaka`, `j.rmsr`, `rmsea`, `chisquare_df`, `j.pm`, `j.thresholds`, `j.factor.cor`, `j.loadings`, `j.loadings.theta`
`u.jacknunits`	Unique jackknife elements

Christoffersson, A. (1977). Two-step weighted least squares factor analysis of dichotomized variables. Psychometrika, 42, 433-438.