infoWI function

infoWI

Calculates an index representing the product of a test information function and an ability distribution.

infoWI(myItems, myAbilities, type = "empirical")

Arguments

• myItems: A vector of item deltas.
• myAbilities: A vector of person abilities.
• type: A character String. Should the test information be calculated empirically ("empirical" - default) or analytically using moments of distribution ("approx").

Returns

A double.

Examples

infoWIOut <- infoWI(runif (10, -2, 3), rnorm(1000, 0, 1))