Linking outcomes from peabody picture vocabulary test forms using item response models

Lesa R Hoffman, Jonathan Templin, Mabel L. Rice

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Purpose: The present work describes how vocabulary ability as assessed by 3 different forms of the Peabody Picture Vocabulary Test (PPVT; Dunn & Dunn, 1997) can be placed on a common latent metric through item response theory (IRT) modeling, by which valid comparisons of ability between samples or over time can then be made. Method: Responses from 2,625 cases in a longitudinal study of 697 persons for 459 unique PPVT items (175 items from Peabody Picture Vocabulary Test-Revised [PPVT-R] Form M [Dunn & Dunn, 1981], 201 items from Peabody Picture Vocabulary Test-3 [PPVT-3] Form A [Dunn & Dunn, 1997], and 83 items from PPVT-3 Form B [Dunn & Dunn, 1997]) were analyzed using a 2-parameter logistic IRT model. Results: The test forms each covered approximately ±3 SDs of vocabulary ability with high reliability. Some differences between item sets in item difficulty and discrimination were found between the PPVT-3 Forms A and B. Conclusions: Comparable estimates of vocabulary ability obtained from different test forms can be created through IRT modeling. The authors have also written a freely available SAS program that uses the obtained item parameters to provide IRT ability estimates given item responses to any of the 3 forms. This scoring resource will allow others with existing PPVT data to benefit from this work as well.

Original languageEnglish (US)
Pages (from-to)754-763
Number of pages10
JournalJournal of Speech, Language, and Hearing Research
Volume55
Issue number3
DOIs
StatePublished - Jun 1 2012

Fingerprint

Language Tests
Aptitude
vocabulary
Vocabulary
ability
Longitudinal Studies
model theory
Peabody Picture Vocabulary Test
longitudinal study
discrimination
logistics
human being
Item Response Theory

Keywords

  • Item response models
  • Item response theory (IRT)
  • Peabody picture vocabulary test (PPVT)

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

Cite this

Linking outcomes from peabody picture vocabulary test forms using item response models. / Hoffman, Lesa R; Templin, Jonathan; Rice, Mabel L.

In: Journal of Speech, Language, and Hearing Research, Vol. 55, No. 3, 01.06.2012, p. 754-763.

Research output: Contribution to journalArticle

Hoffman, Lesa R ; Templin, Jonathan ; Rice, Mabel L. / Linking outcomes from peabody picture vocabulary test forms using item response models. In: Journal of Speech, Language, and Hearing Research. 2012 ; Vol. 55, No. 3. pp. 754-763.
@article{c9fd148b5eda4ed7aebb5d3dbaba10da,
title = "Linking outcomes from peabody picture vocabulary test forms using item response models",
abstract = "Purpose: The present work describes how vocabulary ability as assessed by 3 different forms of the Peabody Picture Vocabulary Test (PPVT; Dunn & Dunn, 1997) can be placed on a common latent metric through item response theory (IRT) modeling, by which valid comparisons of ability between samples or over time can then be made. Method: Responses from 2,625 cases in a longitudinal study of 697 persons for 459 unique PPVT items (175 items from Peabody Picture Vocabulary Test-Revised [PPVT-R] Form M [Dunn & Dunn, 1981], 201 items from Peabody Picture Vocabulary Test-3 [PPVT-3] Form A [Dunn & Dunn, 1997], and 83 items from PPVT-3 Form B [Dunn & Dunn, 1997]) were analyzed using a 2-parameter logistic IRT model. Results: The test forms each covered approximately ±3 SDs of vocabulary ability with high reliability. Some differences between item sets in item difficulty and discrimination were found between the PPVT-3 Forms A and B. Conclusions: Comparable estimates of vocabulary ability obtained from different test forms can be created through IRT modeling. The authors have also written a freely available SAS program that uses the obtained item parameters to provide IRT ability estimates given item responses to any of the 3 forms. This scoring resource will allow others with existing PPVT data to benefit from this work as well.",
keywords = "Item response models, Item response theory (IRT), Peabody picture vocabulary test (PPVT)",
author = "Hoffman, {Lesa R} and Jonathan Templin and Rice, {Mabel L.}",
year = "2012",
month = "6",
day = "1",
doi = "10.1044/1092-4388(2011/10-0216)",
language = "English (US)",
volume = "55",
pages = "754--763",
journal = "Journal of Speech, Language, and Hearing Research",
issn = "1092-4388",
publisher = "American Speech-Language-Hearing Association (ASHA)",
number = "3",

}

TY - JOUR

T1 - Linking outcomes from peabody picture vocabulary test forms using item response models

AU - Hoffman, Lesa R

AU - Templin, Jonathan

AU - Rice, Mabel L.

PY - 2012/6/1

Y1 - 2012/6/1

N2 - Purpose: The present work describes how vocabulary ability as assessed by 3 different forms of the Peabody Picture Vocabulary Test (PPVT; Dunn & Dunn, 1997) can be placed on a common latent metric through item response theory (IRT) modeling, by which valid comparisons of ability between samples or over time can then be made. Method: Responses from 2,625 cases in a longitudinal study of 697 persons for 459 unique PPVT items (175 items from Peabody Picture Vocabulary Test-Revised [PPVT-R] Form M [Dunn & Dunn, 1981], 201 items from Peabody Picture Vocabulary Test-3 [PPVT-3] Form A [Dunn & Dunn, 1997], and 83 items from PPVT-3 Form B [Dunn & Dunn, 1997]) were analyzed using a 2-parameter logistic IRT model. Results: The test forms each covered approximately ±3 SDs of vocabulary ability with high reliability. Some differences between item sets in item difficulty and discrimination were found between the PPVT-3 Forms A and B. Conclusions: Comparable estimates of vocabulary ability obtained from different test forms can be created through IRT modeling. The authors have also written a freely available SAS program that uses the obtained item parameters to provide IRT ability estimates given item responses to any of the 3 forms. This scoring resource will allow others with existing PPVT data to benefit from this work as well.

AB - Purpose: The present work describes how vocabulary ability as assessed by 3 different forms of the Peabody Picture Vocabulary Test (PPVT; Dunn & Dunn, 1997) can be placed on a common latent metric through item response theory (IRT) modeling, by which valid comparisons of ability between samples or over time can then be made. Method: Responses from 2,625 cases in a longitudinal study of 697 persons for 459 unique PPVT items (175 items from Peabody Picture Vocabulary Test-Revised [PPVT-R] Form M [Dunn & Dunn, 1981], 201 items from Peabody Picture Vocabulary Test-3 [PPVT-3] Form A [Dunn & Dunn, 1997], and 83 items from PPVT-3 Form B [Dunn & Dunn, 1997]) were analyzed using a 2-parameter logistic IRT model. Results: The test forms each covered approximately ±3 SDs of vocabulary ability with high reliability. Some differences between item sets in item difficulty and discrimination were found between the PPVT-3 Forms A and B. Conclusions: Comparable estimates of vocabulary ability obtained from different test forms can be created through IRT modeling. The authors have also written a freely available SAS program that uses the obtained item parameters to provide IRT ability estimates given item responses to any of the 3 forms. This scoring resource will allow others with existing PPVT data to benefit from this work as well.

KW - Item response models

KW - Item response theory (IRT)

KW - Peabody picture vocabulary test (PPVT)

UR - http://www.scopus.com/inward/record.url?scp=84862021483&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862021483&partnerID=8YFLogxK

U2 - 10.1044/1092-4388(2011/10-0216)

DO - 10.1044/1092-4388(2011/10-0216)

M3 - Article

VL - 55

SP - 754

EP - 763

JO - Journal of Speech, Language, and Hearing Research

JF - Journal of Speech, Language, and Hearing Research

SN - 1092-4388

IS - 3

ER -