Search results for "Life Orientation Test-Revised"

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Item Response Theory Analysis of the Life Orientation Test-Revised: Age and Gender Differential Item Functioning Analyses

2015

This study is aimed at testing the measurement properties of the Life Orientation Test-Revised (LOT-R) for the assessment of dispositional optimism by employing item response theory (IRT) analyses. The LOT-R was administered to a large sample of 2,862 Italian adults. First, confirmatory factor analyses demonstrated the theoretical conceptualization of the construct measured by the LOT-R as a single bipolar dimension. Subsequently, IRT analyses for polytomous, ordered response category data were applied to investigate the items’ properties. The equivalence of the items across gender and age was assessed by analyzing differential item functioning. Discrimination and severity parameters indic…

AdultMaleAgingCharacteroptimism assessmentAdolescentPersonality InventoryPsychometricsDispositional optimismLife Orientation Test-Reviseditem equivalencebehavioral disciplines and activitiesDevelopmental psychologyAge and genderYoung AdultSex FactorsLife orientationOrientationItem response theoryHumansdifferential item functioningApplied PsychologyAgedAged 80 and overOptimismReproducibility of Resultsitem response theoryMiddle AgedDifferential item functioningClinical PsychologyItalyLife orientation testFemalePsychologyLife Orientation Test-Revised optimism assessment item response theory differential item functioning item equivalence
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Measuring dispositional optimism in patients with chronic heart failure and their healthcare providers: The validity of the Life Orientation Test-Rev…

2017

Patrizia Steca,1 Dario Monzani,1 Antonia Pierobon,2 Giulia Avvenuti,2 Andrea Greco,1 Anna Giardini2 1Department of Psychology, University of Milano – Bicocca, Milan, 2Psychology Unit, Istituti Clinici Scientifici Maugeri Spa SB, IRCCS Montescano, Montescano, Italy Abstract: The Life Orientation Test-Revised (LOT-R) measures dispositional optimism (DO) – an individual difference promoting physical and psychological well-being in healthy adults (HAs) as well as in patients with chronic heart failure (CHF) and healthcare providers (HPs). Controversy has arisen regarding the dimensionality of the LOT-R. Whereas DO was originally defined as a one-dimensional construct, empiri…

Settore M-PSI/01 - Psicologia Generalemedicine.medical_specialtyvalidityMedicine (miscellaneous)Dispositional optimismLife Orientation Test-Revised050109 social psychology050105 experimental psychologymedicine0501 psychology and cognitive sciencesIn patientMeasurement invariancecardiovascular diseasesPsychiatryPharmacology Toxicology and Pharmaceutics (miscellaneous)Depression (differential diagnoses)Original ResearchLife Orientation Test-Revised; dispositional optimism; validity; measurement equivalence; chronic heart failurelcsh:R5-920business.industryHealth Policy05 social sciencesdispositional optimismLife Orientation Test – Revisedmedicine.diseaseDifferential item functioningConfirmatory factor analysishumanitieschronic heart failurePatient Preference and AdherenceHeart failureAnxietymedicine.symptomlcsh:Medicine (General)businessmeasurement equivalenceSocial Sciences (miscellaneous)Clinical psychology
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