ex2: Simulated Data for a Signal Detection Weighted IRT Model

ex2R Documentation

Simulated Data for a Signal Detection Weighted IRT Model

Description

Data and parameters were simulated based on example 2 provided for the sim_dich_response.R function.

Usage

ex2

Format

A list with the following elements:

y

Matrix of dichotomous responses.

ystar

Matrix of latent response variates.

omega

Subject-level effects of the experimental manipulation.

omega_mu

Vector of means for the subject-level effects of the experimental manipulation (1 by K * M).

omega_sigma2

Covariance matrix for the subject-level effects of the experimental manipulation (K * M by K * M).

gamma

Contrast codes matrix.

lambda

Matrix of item slope parameters.

lambda_mu

Vector of means for the item slope parameters (1 by JM).

lambda_sigma2

Covariance matrix for the item slope parameters (JM by JM).

nu

Mean of the item intercept parameters (scalar).

nu_mu

Mean of the item intercept parameters (scalar).

nu_sigma2

Variance of the item intercept parameters (scalar).

zeta

Condition-level prediction errors.

zeta_mu

Vector of means for the condition-level prediction errors (1 by J * M).

zeta_sigma2

Covariance matrix for the condition-level prediction errors (J * M by J * M).

kappa

Item guessing matrix (K by IJ).

condition

Condition vector indiciting distinct conditions or time points.

key

Item key vector where 1 indicates target and 2 indicates distractor (IJ)

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cogirt documentation built on April 3, 2025, 8:14 p.m.