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regDIF (version 1.1.1)

cumulative_traceline_pts: Ordinal tracelines.

Description

Ordinal tracelines.

Usage

cumulative_traceline_pts(
  p_item,
  theta,
  pred_data,
  samp_size,
  num_responses_item,
  num_quad
)

Value

a "matrix" of probability values for categorical (cumulative) item likelihood

Arguments

p_item

Vector of item parameters.

theta

Vector of theta values.

pred_data

Matrix or dataframe of DIF and/or impact predictors.

samp_size

Sample size in dataset.

num_responses_item

Number of responses for item.

num_quad

Number of quadrature points used for approximating the latent variable.