PPMC assuming posterior normality (PPMC-N)

Research Method · All research methods
Evidence · 1 claim (1 for) · 1 study (1 design), q2 · 0 of 1 report an effect size · 1 claim rests on one study

Description

The article introduces PPMC-N, a posterior predictive model checking method for assessing local dependence in unidimensional item response theory models. Unlike standard Bayesian PPMC, it applies to models "estimated using full-information maximum likelihood" and "provides a straightforward method to account for parameter uncertainty in model fit assessment." It extends PPMC, which is "increasingly being used to investigate multidimensionality in IRT models," to the maximum-likelihood estimation setting.

Accounts

• PPMC assuming posterior normality (PPMC-N): a method for evaluating local dependence in IRT models: The article introduces PPMC-N, a posterior predictive model checking method for assessing local dependence in unidimensional item response theory models. Unlike standard Bayesian PPMC, it applies to models "estimated using full-information maximum likelihood" and "provides a straightforward method to account for parameter uncertainty in model fit assessment." It extends PPMC, which is "increasingly being used to investigate multidimensionality in IRT models," to the maximum-likelihood estimation setting. (Megan Kuhfeld (2019))

Claims

• PPMC-N detects local dependence in dichotomous IRT models comparably to the Bayesian PPMC approach [+W]

Related Research Methods

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Key Sources

• Megan Kuhfeld. (2019). A posterior predictive model checking method assuming posterior normality for item response theory. Applied Psychology Measurement 43(2). https://www.nwea.org/research/publication/a-posterior-predictive-model-checking-method-assuming-posterior-normality-for-item-response-theory/

Page metadata

Field	Value
type	research-method
id	ppmc-assuming-posterior-normality-ppmc-n
title	PPMC assuming posterior normality (PPMC-N)
description	The article introduces PPMC-N, a posterior predictive model checking method for assessing local dependence in unidimensional item response theory models.
status	review
moved_from	theory/ppmc-assuming-posterior-normality-local-dependence
generated	by process:sweep-kinds on 2026-10-10
trust	unverified — no one has confirmed this page's content
sources	1 — megan-kuhfeld-2019

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