Test-of-fit summary as a table

The headline fit statistics of a calibration – model, estimation, total item-trait chi-square, the item and person fit-residual moments, fit-location correlations, chi-square flag count, and disordered thresholds – as a two-column table suitable for saving and reporting.

Usage

fit_summary_table(fit)

Arguments

fit

A fitted object from rasch, or a paired-comparison fit from btl (which reports its own headline set: convergence, pairwise chi-square, object separation, thresholds structure, and dependence effects when estimated).

Value

A data frame with columns statistic and value.

Examples

set.seed(1)
d <- seq(-2, 2, length.out = 6)
X <- matrix(rbinom(300 * 6, 1, plogis(outer(rnorm(300), d, "-"))), 300, 6)
colnames(X) <- paste0("I", 1:6)
fit_summary_table(rasch(X))
#>                                 statistic                   value
#> 1                                   Model                     PCM
#> 2                              Estimation pairwise conditional ML
#> 3                               Converged                     yes
#> 4                              Iterations                       3
#> 5             Total item-trait chi-square                  25.067
#> 6                      Degrees of freedom                      24
#> 7                  Item-trait probability                   0.402
#> 8                         Class intervals                       5
#> 9                  Item fit residual mean                   -0.21
#> 10                   Item fit residual SD                    0.61
#> 11             Item fit residual skewness                    0.64
#> 12             Item fit residual kurtosis                   -0.78
#> 13               Person fit residual mean                   -0.24
#> 14                 Person fit residual SD                    0.66
#> 15           Person fit residual skewness                    0.78
#> 16           Person fit residual kurtosis                    0.02
#> 17       Fit-location correlation (items)                  -0.182
#> 18     Fit-location correlation (persons)                   0.004
#> 19 Items with adjusted chi-square p < .05                  0 of 6
#> 20                  Disordered thresholds                    none