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item response theory

Lise Løvereide, Peter Hagell
The 5-item Satisfaction With Life Scale (SWLS) was designed to measure general life satisfaction (LS). Here we examined the psychometric properties of the SWLS in a cohort of persons with Parkinson`s disease (PwPD) and age and gender matched individuals without PD. The SWLS was administered to PwPD and controls from the Norwegian ParkWest study at 5 and 7 years after the time of diagnosis. Data were analysed according to classical test theory (CTT) and Rasch measurement theory. CTT scaling assumptions for computation of a SWLS total score were met (corrected item-total correlations >0...
2016: PloS One
Susanne S Pedersen, Kim Mathiasen, Karl Bang Christensen, Guido Makransky
OBJECTIVE: To assess the psychometric properties of the Patient Health Questionnaire (PHQ-9), a measure of depressive symptoms, in a large Danish national cohort of patients with heart disease, implanted with an implantable cardioverter defibrillator (ICD), using item response theory. METHODS: A prospective cohort of patients implanted with an ICD (n=1531; 80.4% men) completed the PHQ-9 at the time of implant. Data were analyzed using two item response theory models, the partial credit model and the generalized partial credit model...
November 2016: Journal of Psychosomatic Research
(no author information available yet)
Reports an error in "Does Reading a Single Passage of Literary Fiction Really Improve Theory of Mind? An Attempt at Replication" by Maria Eugenia Panero, Deena Skolnick Weisberg, Jessica Black, Thalia R. Goldstein, Jennifer L. Barnes, Hiram Brownell and Ellen Winner (Journal of Personality and Social Psychology, Advanced Online Publication, Sep 19, 2016, np). In the article, due to an error in stimulus construction, four items (three authors, one foil) were omitted from the ART presented to all participants tested by Research Group 1...
November 2016: Journal of Personality and Social Psychology
H Felix Fischer, Matthias Rose
BACKGROUND: Recently, a growing number of Item-Response Theory (IRT) models has been published, which allow estimation of a common latent variable from data derived by different Patient Reported Outcomes (PROs). When using data from different PROs, direct estimation of the latent variable has some advantages over the use of sum score conversion tables. It requires substantial proficiency in the field of psychometrics to fit such models using contemporary IRT software. We developed a web application ( http://www...
October 19, 2016: BMC Medical Research Methodology
Marina Ávila-Villanueva, Ana Rebollo-Vázquez, José M Ruiz-Sánchez de León, Meritxell Valentí, Miguel Medina, Miguel A Fernández-Blázquez
Introduction: Subjective memory complaints (SMC) in the elderly have been suggested as an early sign of dementia. This study aims at investigating whether specific cognitive complaints are more useful than others to discriminate Mild Cognitive Impairment (MCI) by examining the dimensional structure of the Everyday Memory Questionnaire (EMQ). Materials and Methods: A sample of community-dwelling elderly individuals was recruited (766 controls and 78 MCI). The EMQ was administered to measure self-perception of cognitive complaints...
2016: Frontiers in Aging Neuroscience
Kalliopi Vrotsou, Ricardo Cuéllar, Félix Silió, Miguel Ángel Rodriguez, Daniel Garay, Gorka Busto, Ziortza Trancho, Antonio Escobar
BACKGROUND: The aim of the current study was to validate the self-report section of the American Shoulder and Elbow Surgeons questionnaire (ASES-p) into Spanish. METHODS: Shoulder pathology patients were recruited and followed up to 6 months post treatment. The ASES-p, Constant, SF-36 and Barthel scales were filled-in pre and post treatment. Reliability was tested with Cronbach's alpha, convergent validity with Spearman's correlations coefficients. Confirmatory factor analysis (CFA) and the Rasch model were implemented for assessing structural validity and unidimensionality of the scale...
October 18, 2016: Health and Quality of Life Outcomes
Skye P Barbic, Stefan J Cano
This commentary argues the importance of robust, meaningful assessment of clinical and functional outcomes in psychiatry. Outcome assessments should be fit for the purpose of measuring relevant concepts of interest in specific clinical settings. As well, the measurement model selected to develop and test assessments can be critical for guiding care. Three types of measurement models are presented: classical test theory, item response theory, and Rasch measurement theory. To optimise current diagnostic and treatment practices in psychiatry, careful consideration of these models is warranted...
October 2016: BJPsych Bulletin
Nancy J Carballo, Cathy A Alessi, Jennifer L Martin, Michael N Mitchell, Ron D Hays, Nananda Col, Emily S Patterson, Stella Jouldjian, Karen Josephson, Constance H Fung
PURPOSE: Obstructive sleep apnea is a prevalent sleep disorder among older adults. Oral appliances are increasingly prescribed as therapy for obstructive sleep apnea. Adherence to oral appliance therapy is highly variable. Based on value-expectancy theory and other social-psychological theories, adherence to oral appliance therapy may be influenced by patients' perceived effectiveness of the therapy, self-efficacy, and availability of social support. We examined these perceptions among older adults with obstructive sleep apnea who were prescribed oral appliance therapy...
October 14, 2016: Clinical Therapeutics
Eduardo Fonseca-Pedrero, Alex Cohen, Javier Ortuño-Sierra, Alicia Pérez de Álbeniz, José Muñiz
The main goal of the present study was to test the measurement equivalence of the Schizotypal Personality Questionnaire - Brief Revised (SPQ-BR) scores in a large sample of Spanish and American non-clinical young adults. The sample was made up of 5,625 young adults (M = 19.65 years; SD = 2.53; 38.5% males). Study of the internal structure, using confirmatory factor analysis (CFA), revealed that SPQ-BR items were grouped in a theoretical internal structure of nine first-order factors. Moreover, three or four second-order factor and bifactor models showed adequate goodness-of-fit indices...
October 17, 2016: Journal of Personality Disorders
Björn Andersson, Marie Wiberg
Item response theory (IRT) observed-score kernel equating is introduced for the non-equivalent groups with anchor test equating design using either chain equating or post-stratification equating. The equating function is treated in a multivariate setting and the asymptotic covariance matrices of IRT observed-score kernel equating functions are derived. Equating is conducted using the two-parameter and three-parameter logistic models with simulated data and data from a standardized achievement test. The results show that IRT observed-score kernel equating offers small standard errors and low equating bias under most settings considered...
October 14, 2016: Psychometrika
Victor B Arias, Daniel E Nuñez, Agustín Martínez-Molina, Fernando P Ponce, Benito Arias
The Diagnostic and Statistical Manual of Mental Disorders (DSM) diagnostic criteria assume that the 18 symptoms carry the same weight in an Attention Deficit with Hyperactivity Disorder (ADHD) diagnosis and bear the same discriminatory capacity. However, it is reasonable to think that symptoms may differ in terms of severity and even in the reliability with they represent the disorder. To test this hypothesis, the aim of this study was to calibrate in a sample of Spanish children (age 4-7; n = 784) a scale for assessing the symptoms of ADHD proposed by Diagnostic and Statistical Manual of Mental Disorders, IV-TR within the framework of Item Response Theory...
2016: PloS One
Lydia G Emm-Collison, Martyn Standage, Fiona B Gillison
Grounded within self-determination theory (SDT; Ryan & Deci, in press; Deci & Ryan, 2000), three studies were conducted to develop and psychometrically test a measure of adolescents' perceptions of psychological need support for exercise (viz., for autonomy, competence, and relatedness): the Adolescent Psychological Need Support in Exercise Questionnaire (APNSEQ). In Study 1, 34-items were developed in collaboration with an expert panel. Through categorical confirmatory factor analysis and item response theory, responses from 433 adolescents were used to identify the best fitting and performing items in Study 2...
October 13, 2016: Journal of Sport & Exercise Psychology
Ronald D Rogge, Frank D Fincham, Dev Crasta, Michael R Maniaci
Three studies were undertaken to develop the Positive-Negative Relationship Quality scale (PN-RQ), conceptualizing relationship quality as a bidimensional construct in which the positive qualities of a relationship are treated as distinct from its negative qualities. Analyses in emerging adults (Study 1: N = 1,814), in online respondents (Study 2: N = 787) with a 2-week follow-up, and in a single group pre-intervention-post-intervention study (Study 3: N = 54) of the Promoting Awareness, Improving Relationships (PAIR) program provided support for (a) positive and negative qualities as distinct dimensions via confirmatory factor analysis (CFA), (b) the PN-RQ representing an item response theory-optimized measure of these 2 dimensions, (c) substantive differences between indifferent (low positive and negative qualities) and ambivalent (high positive and negative qualities) relationships potentially obscured by unidimensional scales, (d) high levels of responsiveness of the PN-RQ scales to change over time, (e) the unique predictive validity offered over time by the PN-RQ scores beyond that offered by scores of current unidimensional measures of relationship quality, and (f) the unique longitudinal information gained by using the PN-RQ as a bidimensional outcome measure in an intervention study...
October 13, 2016: Psychological Assessment
Michael Lawton, Michele T M Hu, Fahd Baig, Claudio Ruffmann, Eilidh Barron, Diane M A Swallow, Naveed Malek, Katherine A Grosset, Nin Bajaj, Roger A Barker, Nigel Williams, David J Burn, Thomas Foltynie, Huw R Morris, Nicholas W Wood, Margaret T May, Donald G Grosset, Yoav Ben-Shlomo
BACKGROUND: Impaired olfaction is an important feature in Parkinson's disease (PD) and other neurological diseases. A variety of smell identification tests exist such as "Sniffin' Sticks" and the University of Pennsylvania Smell Identification Test (UPSIT). An important part of research is being able to replicate findings or combining studies in a meta-analysis. This is difficult if olfaction has been measured using different metrics. We present conversion methods between the: UPSIT, Sniffin' 16, and Brief-SIT (B-SIT); and Sniffin' 12 and Sniffin' 16 odour identification tests...
September 25, 2016: Parkinsonism & related Disorders
Fei-Fei Huang, Qing Yang, Xuan Ye Han, Jing-Ping Zhang, Ting Lin
OBJECTIVE: The purpose of this study was to develop a Self-Efficacy Scale for Rehabilitation Management designed specifically for postoperative lung cancer patients (SESPRM-LC), and to evaluate its psychometric properties. PATIENTS AND METHODS: Based on the concept of self-management of chronic disease, items were developed from literature review and semi-structured interviews of 10 lung cancer patients and screened by expert consultation and pilot testing. Psychometric evaluation was done with 448 postoperative lung cancer patients recruited from five tertiary hospitals in Fuzhou, China, by incorporating classical test theory (CTT) and item response theory (IRT) methods...
October 10, 2016: Psycho-oncology
Angelo Brandelli Costa, Wagner de Lara Machado, Denise Ruschel Bandeira, Henrique Caetano Nardi
In Brazil, there is a deficit of culturally adapted tools to assess prejudice against sexual and gender diversity with empirically demonstrable validity and reliability. Prejudice against non-heterosexual orientations is a strong problem within Brazilian culture and is particularly related to non-normative expressions of gender. To address these issues, a scale was created. The objective of this article is to validate the revised version of this instrument developed for the specificities of Brazilian culture and establish its reliability...
August 12, 2016: Journal of Homosexuality
Carlos Alós-Ferrer, Michele Garagnani, Sabine Hügelschäfer
We present novel evidence on response times and personality traits in standard questions from the decision-making literature where responses are relatively slow (medians around half a minute or above). To this end, we measured response times in a number of incentivized, framed items (decisions from description) including the Cognitive Reflection Test, two additional questions following the same logic, and a number of classic questions used to study decision biases in probability judgments (base-rate neglect, the conjunction fallacy, and the ratio bias)...
2016: Frontiers in Psychology
Dylan Molenaar, Daniel Oberski, Jeroen Vermunt, Paul De Boeck
Current approaches to model responses and response times to psychometric tests solely focus on between-subject differences in speed and ability. Within subjects, speed and ability are assumed to be constants. Violations of this assumption are generally absorbed in the residual of the model. As a result, within-subject departures from the between-subject speed and ability level remain undetected. These departures may be of interest to the researcher as they reflect differences in the response processes adopted on the items of a test...
August 11, 2016: Multivariate Behavioral Research
Jianan Sun, Yunxiao Chen, Jingchen Liu, Zhiliang Ying, Tao Xin
We develop a latent variable selection method for multidimensional item response theory models. The proposed method identifies latent traits probed by items of a multidimensional test. Its basic strategy is to impose an [Formula: see text] penalty term to the log-likelihood. The computation is carried out by the expectation-maximization algorithm combined with the coordinate descent algorithm. Simulation studies show that the resulting estimator provides an effective way in correctly identifying the latent structures...
October 3, 2016: Psychometrika
David Magis, Norman Verhelst
The purpose of this note is to focus on the finiteness of the weighted likelihood estimator (WLE) of ability in the context of dichotomous and polytomous item response theory (IRT) models. It is established that the WLE always returns finite ability estimates. This general result is valid for dichotomous (one-, two-, three- and four-parameter logistic) IRT models, the class of polytomous difference models and divide-by-total models, independently of the number of items, the item parameters and the response patterns...
October 3, 2016: Psychometrika
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