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      Validation of the Spanish-language Cardiff Anomalous Perception Scale

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          Abstract

          The Cardiff Anomalous Perceptions Scale (CAPS) is a psychometric measure of hallucinatory experience. It has been widely used in English and used in initial studies in Spanish but a full validation study has not yet been published. We report a validation study of the Spanish-language CAPS, conducted in both Spain and Colombia to cover both European and Latin American Spanish. The Spanish-language version of the CAPS was produced through back translation with slight modifications made for local dialects. In Spain, 329 non-clinical participants completed the CAPS along with 40 patients with psychosis. In Colombia, 190 non-clinical participants completed the CAPS along with 21 patients with psychosis. Participants completed other psychometric scales measuring psychosis-like experience to additionally test convergent and divergent validity. The Spanish-language CAPS was found to have good internal reliability. Test-retest reliability was slightly below the cut-off, although could only be tested in the Spanish non-clinical sample. The scale showed solid construct validity and a principal components analysis broadly replicated previously reported three component factor structures for the CAPS.

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          From alpha to omega: a practical solution to the pervasive problem of internal consistency estimation.

          Coefficient alpha is the most popular measure of reliability (and certainly of internal consistency reliability) reported in psychological research. This is noteworthy given the numerous deficiencies of coefficient alpha documented in the psychometric literature. This mismatch between theory and practice appears to arise partly because users of psychological scales are unfamiliar with the psychometric literature on coefficient alpha and partly because alternatives to alpha are not widely known. We present a brief review of the psychometric literature on coefficient alpha, followed by a practical alternative in the form of coefficient omega. To facilitate the shift from alpha to omega, we also present a brief guide to the calculation of point and interval estimates of omega using a free, open source software environment. © 2013 The British Psychological Society.
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            Assessing Factorial Invariance in Ordered-Categorical Measures

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              [International Test Commission Guidelines for test translation and adaptation: second edition].

              Adapting tests across cultures is a common practice that has increased in all evaluation areas in recent years. We live in an increasingly multicultural and multilingual world in which the tests are used to support decision-making in the educational, clinical, organizational and other areas, so the adaptation of tests becomes a necessity. The main goal of this paper is to present the second edition of the guidelines of the International Test Commission (ITC) for adapting tests across cultures. A task force of six international experts reviewed the original guidelines proposed by the International Test Commission, taking into account the advances and developments of the field. As a result of the revision this new edition consists of twenty guidelines grouped into six sections: Precondition, test development, confirmation, administration, score scales and interpretation, and document. The different sections are reviewed, and the possible sources of error influencing the tests translation and adaptation analyzed. Twenty guidelines are proposed for translating and adapting tests across cultures. Finally we discuss the future perspectives of the guidelines in relation to the new developments in the field of psychological and educational assessment.
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                Author and article information

                Contributors
                Role: ConceptualizationRole: Data curationRole: InvestigationRole: MethodologyRole: Project administrationRole: ResourcesRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: InvestigationRole: MethodologyRole: Project administrationRole: Writing – original draftRole: Writing – review & editing
                Role: Formal analysisRole: MethodologyRole: Writing – original draftRole: Writing – review & editing
                Role: ConceptualizationRole: MethodologyRole: Project administrationRole: Writing – review & editing
                Role: ConceptualizationRole: MethodologyRole: Project administrationRole: Writing – review & editing
                Role: ConceptualizationRole: Data curationRole: Formal analysisRole: MethodologyRole: Project administrationRole: Writing – original draftRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS One
                PLoS ONE
                plos
                plosone
                PLoS ONE
                Public Library of Science (San Francisco, CA USA )
                1932-6203
                6 March 2019
                2019
                : 14
                : 3
                : e0213425
                Affiliations
                [1 ] Universidad Cooperativa de Colombia, Medellín, Colombia
                [2 ] Division of Psychiatry, University College London, United Kingdom
                [3 ] UGC Salud Mental, Hospital Universitario Reina Sofía, Córdoba, Spain
                [4 ] Universidad de Antioquia, Medellín, Colombia
                University of La Rioja, SPAIN
                Author notes

                Competing Interests: VB is the recipient of a Wellcome Trust Seed Award in Science [200589/Z/16/Z]. JH-L has received honoraria for giving talks fromSanofi and Janssen. The other authors have declared that no competing interests exist. We would like to confirm that our declaration of interest does not alter our adherence to PLOS ONE policies on sharing data and materials.

                Author information
                http://orcid.org/0000-0001-8616-4847
                Article
                PONE-D-17-10025
                10.1371/journal.pone.0213425
                6402668
                30840703
                a6384983-808f-4e9f-826b-1f43a21dc4db
                © 2019 Tamayo-Agudelo et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 14 March 2017
                : 21 February 2019
                Page count
                Figures: 0, Tables: 2, Pages: 11
                Funding
                Funded by: funder-id http://dx.doi.org/10.13039/100004440, Wellcome Trust;
                Award ID: 200589/Z/16/Z
                Award Recipient :
                Funded by: funder-id http://dx.doi.org/10.13039/501100000272, National Institute for Health Research;
                Award ID: UCLH NIHR Biomedical Research Centre
                Award Recipient :
                VB is supported by a Wellcome Trust Seed Award in Science [200589/Z/16/Z] and the UCLH NIHR Biomedical Research Centre.
                Categories
                Research Article
                People and places
                Geographical locations
                Europe
                European Union
                Spain
                People and places
                Geographical locations
                South America
                Colombia
                Medicine and Health Sciences
                Mental Health and Psychiatry
                Psychoses
                Biology and Life Sciences
                Neuroscience
                Sensory Perception
                Hallucinations
                Biology and Life Sciences
                Psychology
                Sensory Perception
                Hallucinations
                Social Sciences
                Psychology
                Sensory Perception
                Hallucinations
                Medicine and Health Sciences
                Health Care
                Research and Analysis Methods
                Mathematical and Statistical Techniques
                Statistical Methods
                Multivariate Analysis
                Principal Component Analysis
                Physical Sciences
                Mathematics
                Statistics
                Statistical Methods
                Multivariate Analysis
                Principal Component Analysis
                Biology and Life Sciences
                Psychology
                Psychometrics
                Social Sciences
                Psychology
                Psychometrics
                Medicine and Health Sciences
                Mental Health and Psychiatry
                Custom metadata
                All data, analysis scripts and copies of the questionnaires are freely available online at the following resource: https://osf.io/ekwgb/ (DOI 10.17605/OSF.IO/EKWGB).

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                Uncategorized

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