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Original Article

Floor effects on the WISC-IV

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Pages 111-119 | Published online: 12 Nov 2013

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Devadrita Talapatra, Laurel Snider, Jeanine Coleman, Talia Thompson, Jessica S. Reinhardt, David Hessl & Karen Riley. (2023) Deviation scores: An innovative approach to interpreting cognitive test results for individuals with intellectual disabilities. Journal of Applied Research in Intellectual Disabilities 36:6, pages 1218-1228.
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A. Ostrolenk & V. Courchesne. (2023) Examining the validity of the use of ratio IQs in psychological assessments. Acta Psychologica 240, pages 104054.
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María Elena Márquez-Caraveo, Rocío Rodríguez-Valentín, Verónica Pérez-Barrón, Ruth Argelia Vázquez-Salas, José Carlos Sánchez-Ferrer, Filipa De Castro, Betania Allen-Leigh & Eduardo Lazcano-Ponce. (2021) Children and adolescents with neurodevelopmental disorders show cognitive heterogeneity and require a person-centered approach. Scientific Reports 11:1.
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C. L. Hom, D. Walsh, G. Fernandez, A. Tournay, P. Touchette & I. T. Lott. (2021) Cognitive assessment using the Rapid Assessment for Developmental Disabilities, Second Edition (RADD‐2). Journal of Intellectual Disability Research 65:9, pages 831-848.
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Naoki IkegayaMasaki Iwasaki, Yuu Kaneko, Takanobu KaidoYuiko Kimura, Tetsuya YamamotoNoriko SumitomoTakashi SaitoEiji NakagawaKenji SugaiMasayuki SasakiAkio Takahashi & Taisuke Otsuki. (2020) Cognitive and developmental outcomes after pediatric insular epilepsy surgery for focal cortical dysplasia. Journal of Neurosurgery: Pediatrics 26:5, pages 543-551.
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Emma K. Baker, Marta Arpone, Solange Aliaga Vera, Lesley Bretherton, Alexandra Ure, Claudine M. Kraan, Minh Bui, Ling Ling, David Francis, Matthew F. Hunter, Justine Elliott, Carolyn Rogers, Michael J. Field, Jonathan Cohen, Lorena Santa Maria, Victor Faundes, Bianca Curotto, Paulina Morales, Cesar Trigo, Isabel Salas, Angelica M. Alliende, David J. Amor & David E. Godler. (2019) Intellectual functioning and behavioural features associated with mosaicism in fragile X syndrome. Journal of Neurodevelopmental Disorders 11:1.
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Matúš Šimkovic & Birgit Träuble. (2019) Robustness of statistical methods when measure is affected by ceiling and/or floor effect. PLOS ONE 14:8, pages e0220889.
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E. Toffalini, S. Buono, T. Zagaria, A. Calcagnì & C. Cornoldi. (2019) Using Z and age‐equivalent scores to address WISC‐IV floor effects for children with intellectual disability. Journal of Intellectual Disability Research 63:6, pages 528-538.
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Talia Thompson, Jeanine M. Coleman, Karen Riley, Laurel A. Snider, Londi J. Howard, Stephanie M. Sansone & David Hessl. (2018) Standardized Assessment Accommodations for Individuals with Intellectual Disability. Contemporary School Psychology 22:4, pages 443-457.
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L. Pezzuti, R. Nacinovich, S. Oggiano, M. Bomba, R. Ferri, A. La Stella, S. Rossetti & A. Orsini. (2018) Beyond the floor effect on the WISC‐IV in individuals with Down syndrome: are there cognitive strengths and weaknesses?. Journal of Intellectual Disability Research 62:7, pages 593-603.
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Marta Arpone, Emma K. Baker, Lesley Bretherton, Minh Bui, Xin Li, Simon Whitaker, Cheryl Dissanayake, Jonathan Cohen, Chriselle Hickerton, Carolyn Rogers, Mike Field, Justine Elliott, Solange M. Aliaga, Ling Ling, David Francis, Stephen J. C. Hearps, Matthew F. Hunter, David J. Amor & David E. Godler. (2018) Intragenic DNA methylation in buccal epithelial cells and intellectual functioning in a paediatric cohort of males with fragile X. Scientific Reports 8:1.
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Leina Zhu & Jorge Gonzalez. (2017) Modeling Floor Effects in Standardized Vocabulary Test Scores in a Sample of Low SES Hispanic Preschool Children under the Multilevel Structural Equation Modeling Framework. Frontiers in Psychology 8.
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Simon Whitaker. (2017) How accurate are modern IQ tests at categorising people as having an intellectual disability or not?. Clinical Psychology Forum 1:289, pages 53-57.
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Simon Whitaker. (2015) Error in the measurement of low IQ: Implications for research, clinical practice and diagnosis. Clinical Psychology Forum 1:274, pages 37-40.
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Simon Whitaker. (2015) How accurate are modern IQ tests at categorising people as having an intellectual disability or not?. Clinical Psychology Forum 1:270, pages 49-53.
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A. Orsini, L. Pezzuti & S. Hulbert. (2015) Beyond the floor effect on the Wechsler Intelligence Scale for Children - 4th Ed. (WISC-IV): calculating IQ and Indexes of subjects presenting a floored pattern of results. Journal of Intellectual Disability Research 59:5, pages 468-473.
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Karen McKenzie & Aja Louise Murray. (2015) Evaluating the use of the Child and Adolescent Intellectual Disability Screening Questionnaire (CAIDS-Q) to estimate IQ in children with low intellectual ability. Research in Developmental Disabilities 37, pages 31-36.
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Stephanie M Sansone, Andrea Schneider, Erika Bickel, Elizabeth Berry-Kravis, Christina Prescott & David Hessl. (2014) Improving IQ measurement in intellectual disabilities using true deviation from population norms. Journal of Neurodevelopmental Disorders 6:1.
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A. Murray, K. McKenzie & G. Murray. (2014) To what extent does g impact on conceptual, practical and social adaptive functioning in clinically referred children? . Journal of Intellectual Disability Research 58:8, pages 777-785.
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