CEquating: Equating item parameter only sampled by common item design....

In takuizum/irtfun2: Some useful functions for IRT

Description

Equating item parameter only sampled by common item design. FOR ONLY 2PLM

Usage

CEquating(
  T_para,
  F_para,
  method = "SL",
  D = 1.702,
  N = 31,
  mintheta = -6,
  maxtheta = 6,
  Change = "to",
  Easy = F
)

Arguments

T_para	a parameter data.frame equating TO, base item scale.
F_para	a parameter data.frame equating FROM, transromed item scale.
method	equating method. U can select "SL" = Stocking & Lord, "HB" = Haebara, "MS" = Mean & Sigma, "MM" = Mean & Mean.
D	a factor canstant.
N	the number of nodes.
mintheta	a minimum value of theta in integration.
maxtheta	a maximum value of theta in integration.
Change	integer. if 'to' equated parameter of common item is no transformed parameter from T_para, if 'transformed' transformed parameter, if 'mean' mean and geometric mean.
Easy	logical. if TRUE Easy Estimation out put file can be used. Default FALSE estip2 output file is able to use.

takuizum/irtfun2 documentation built on May 10, 2020, 8:30 a.m.