Measuring dispositional optimism in student Veterans: An item response theory analysis

Emre Umucu, Jessica M. Brooks, Beatrice Lee, Kanako Iwanaga, Jia Rung Wu, Ada Chen, Fong Chan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Background: The psychometric properties of the Life Orientation Test-Revised (LOT-R) have been established among college students, yet psychometric evidence is lacking for a sample of student Veterans in postsecondary education. Aims: The purpose of this study was to evaluate psychometric properties of the LOT-R for the assessment of dispositional optimism in student Veterans by using classical test theory (CTT) in conjunction with item response theory (IRT). Method: A sample of 205 student Veterans were recruited from universities across the United States. Exploratory factor analysis was conducted to test the unidimensionality of the LOT-R. A polychotomous IRT model using graded response model (GRM) was estimated. Reliability and concurrent validity of the LOT-R were tested. Results: CTT in conjunction with IRT validated that the LOT-R is a psychometrically sound unidimensional instrument for assessing the levels of dispositional optimism in student Veterans. The LOT-R was found to be associated with hope, resilience, PERMA, life satisfaction, depression, and anxiety in the theoretically expected directions. The internal consistency reliability coefficient was computed to be.86. Conclusions: Given its reliability and validity and applicability among this specific population, clinicians, educators, and researchers might use the LOT-R to assess and monitor dispositional optimism among student Veterans.

Original languageEnglish
Pages (from-to)590-597
Number of pages8
JournalMilitary Psychology
Volume30
Issue number6
DOIs
Publication statusPublished - 2018 Nov 2

Fingerprint

Veterans
optimism
Students
Psychometrics
psychometrics
student
test theory
Reproducibility of Results
Hope
model theory
Optimism
resilience
Statistical Factor Analysis
factor analysis
Anxiety
Research Personnel
educator
Depression
anxiety
Education

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Social Sciences (miscellaneous)
  • Psychology(all)

Cite this

Umucu, Emre ; Brooks, Jessica M. ; Lee, Beatrice ; Iwanaga, Kanako ; Wu, Jia Rung ; Chen, Ada ; Chan, Fong. / Measuring dispositional optimism in student Veterans : An item response theory analysis. In: Military Psychology. 2018 ; Vol. 30, No. 6. pp. 590-597.
@article{3077e862a83d487baba08812e0a7d0d7,
title = "Measuring dispositional optimism in student Veterans: An item response theory analysis",
abstract = "Background: The psychometric properties of the Life Orientation Test-Revised (LOT-R) have been established among college students, yet psychometric evidence is lacking for a sample of student Veterans in postsecondary education. Aims: The purpose of this study was to evaluate psychometric properties of the LOT-R for the assessment of dispositional optimism in student Veterans by using classical test theory (CTT) in conjunction with item response theory (IRT). Method: A sample of 205 student Veterans were recruited from universities across the United States. Exploratory factor analysis was conducted to test the unidimensionality of the LOT-R. A polychotomous IRT model using graded response model (GRM) was estimated. Reliability and concurrent validity of the LOT-R were tested. Results: CTT in conjunction with IRT validated that the LOT-R is a psychometrically sound unidimensional instrument for assessing the levels of dispositional optimism in student Veterans. The LOT-R was found to be associated with hope, resilience, PERMA, life satisfaction, depression, and anxiety in the theoretically expected directions. The internal consistency reliability coefficient was computed to be.86. Conclusions: Given its reliability and validity and applicability among this specific population, clinicians, educators, and researchers might use the LOT-R to assess and monitor dispositional optimism among student Veterans.",
author = "Emre Umucu and Brooks, {Jessica M.} and Beatrice Lee and Kanako Iwanaga and Wu, {Jia Rung} and Ada Chen and Fong Chan",
year = "2018",
month = "11",
day = "2",
doi = "10.1080/08995605.2018.1522161",
language = "English",
volume = "30",
pages = "590--597",
journal = "Military Psychology",
issn = "0899-5605",
publisher = "Routledge",
number = "6",

}

Measuring dispositional optimism in student Veterans : An item response theory analysis. / Umucu, Emre; Brooks, Jessica M.; Lee, Beatrice; Iwanaga, Kanako; Wu, Jia Rung; Chen, Ada; Chan, Fong.

In: Military Psychology, Vol. 30, No. 6, 02.11.2018, p. 590-597.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Measuring dispositional optimism in student Veterans

T2 - An item response theory analysis

AU - Umucu, Emre

AU - Brooks, Jessica M.

AU - Lee, Beatrice

AU - Iwanaga, Kanako

AU - Wu, Jia Rung

AU - Chen, Ada

AU - Chan, Fong

PY - 2018/11/2

Y1 - 2018/11/2

N2 - Background: The psychometric properties of the Life Orientation Test-Revised (LOT-R) have been established among college students, yet psychometric evidence is lacking for a sample of student Veterans in postsecondary education. Aims: The purpose of this study was to evaluate psychometric properties of the LOT-R for the assessment of dispositional optimism in student Veterans by using classical test theory (CTT) in conjunction with item response theory (IRT). Method: A sample of 205 student Veterans were recruited from universities across the United States. Exploratory factor analysis was conducted to test the unidimensionality of the LOT-R. A polychotomous IRT model using graded response model (GRM) was estimated. Reliability and concurrent validity of the LOT-R were tested. Results: CTT in conjunction with IRT validated that the LOT-R is a psychometrically sound unidimensional instrument for assessing the levels of dispositional optimism in student Veterans. The LOT-R was found to be associated with hope, resilience, PERMA, life satisfaction, depression, and anxiety in the theoretically expected directions. The internal consistency reliability coefficient was computed to be.86. Conclusions: Given its reliability and validity and applicability among this specific population, clinicians, educators, and researchers might use the LOT-R to assess and monitor dispositional optimism among student Veterans.

AB - Background: The psychometric properties of the Life Orientation Test-Revised (LOT-R) have been established among college students, yet psychometric evidence is lacking for a sample of student Veterans in postsecondary education. Aims: The purpose of this study was to evaluate psychometric properties of the LOT-R for the assessment of dispositional optimism in student Veterans by using classical test theory (CTT) in conjunction with item response theory (IRT). Method: A sample of 205 student Veterans were recruited from universities across the United States. Exploratory factor analysis was conducted to test the unidimensionality of the LOT-R. A polychotomous IRT model using graded response model (GRM) was estimated. Reliability and concurrent validity of the LOT-R were tested. Results: CTT in conjunction with IRT validated that the LOT-R is a psychometrically sound unidimensional instrument for assessing the levels of dispositional optimism in student Veterans. The LOT-R was found to be associated with hope, resilience, PERMA, life satisfaction, depression, and anxiety in the theoretically expected directions. The internal consistency reliability coefficient was computed to be.86. Conclusions: Given its reliability and validity and applicability among this specific population, clinicians, educators, and researchers might use the LOT-R to assess and monitor dispositional optimism among student Veterans.

UR - http://www.scopus.com/inward/record.url?scp=85057233960&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057233960&partnerID=8YFLogxK

U2 - 10.1080/08995605.2018.1522161

DO - 10.1080/08995605.2018.1522161

M3 - Article

AN - SCOPUS:85057233960

VL - 30

SP - 590

EP - 597

JO - Military Psychology

JF - Military Psychology

SN - 0899-5605

IS - 6

ER -