itemfit: Item Fit

In nando11235813/raschreg: Item Response Theory models including explanatory variables of the ability parameter

Description

Plots fir of a specified item.

Usage

  itemfit(mod, item, ab_type = 'wle', xlim = c(-5, 5), col = 'tomato',
  main = NULL, level = 0.95)

Arguments

mod	Fitted Rasch (regression) model.
item	Character. Indicates which item fit is to be assessed.
ab_type	Character. Type of ability estimation procedure. Default to wle.
xlim	Range of theta values over which to plot ICC. Default is c(-3,3).
col	Color of ICC. Default is 'tomato'.
main	A main title for the plot.
level	The confidence level required. Default to 0.95.

Details

Displays ICC of a specified item along with observed proportions (along with likelihood based confidence intervals) of items grouped by person-parameter estimates.

Author(s)

Fernando Massa, [e-mail]

References

\insertRef

somerville2013raschreg

See Also

plot.rasch, info, forest, pim

Examples

n <- 100
X <- sim_rasch(n)
mod <- rasch(X)
itemfit(mod, 'item6')

nando11235813/raschreg documentation built on Oct. 2, 2021, 3:11 p.m.