Discrimination (IRT) to Standardized Factor Loading.

Convert a discrimination parameter in item response theory to a standardized factor loading.

Usage

discriminationToFactorLoading(a, model = "probit")

Arguments

a

Discrimination parameter in item response theory.

model

Model type. One of:

• "logit"

• "probit"

Value

Standardized factor loading.

Details

Convert a discrimination parameter in item response theory to a standardized factor loading

See also

https://aidenloe.github.io/introToIRT.html https://stats.stackexchange.com/questions/228629/conversion-of-irt-logit-discrimination-parameter-to-factor-loading-metric

Other IRT: deriv_d_negBinom(), fourPL(), itemInformation(), reliabilityIRT(), standardErrorIRT(), test_info_4PL()

Examples

discriminationToFactorLoading(0.5)
#> [1] 0.2818611
discriminationToFactorLoading(1.3)
#> [1] 0.6069994
discriminationToFactorLoading(1.3, model = "logit")
#> [1] 0.3880945