var,Itempool-method {irt} | R Documentation |
var
Returns the variance of each item of an
Itempool-class
object for a given ability or abilities,
i.e. \theta
.
## S4 method for signature 'Itempool'
var(x, y = NULL, na.rm = FALSE, use)
x |
An |
y |
A numeric vector containing the ability parameters (i.e. theta). |
na.rm |
Ignored for |
use |
Ignored for |
Item variances at given theta will be returned.
Emre Gonulates