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Validation and Normalization of the Tower of London-Drexel University Test 2nd Edition in an Adult Population with Intellectual Disability

Despite how important it is to assess executive functioning in persons with Intellectual Disability (ID), instruments adapted and validated for this population are scarce. This study’s primary goal was to find evidence for the validity of the ID version of the Tower of London (TOLDXtm) test in perso...

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Published in:The Spanish journal of psychology 2017-07, Vol.20, p.E32-E32
Main Authors: García-Alba, Javier, Esteba-Castillo, Susanna, Castellanos López, Miguel Ángel, Rodríguez Hidalgo, Emili, Ribas Vidal, Nuria, Moldenhauer Díaz, Fernando, Novell-Alsina, Ramón
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container_title The Spanish journal of psychology
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creator García-Alba, Javier
Esteba-Castillo, Susanna
Castellanos López, Miguel Ángel
Rodríguez Hidalgo, Emili
Ribas Vidal, Nuria
Moldenhauer Díaz, Fernando
Novell-Alsina, Ramón
description Despite how important it is to assess executive functioning in persons with Intellectual Disability (ID), instruments adapted and validated for this population are scarce. This study’s primary goal was to find evidence for the validity of the ID version of the Tower of London (TOLDXtm) test in persons with mild (IDMi) and moderate (IDMo) levels of ID with Down Syndrome (DS). A multicenter study was carried out. Subjects (n = 63, ≥ 39 years old) had DS with mild (n = 39) or moderate ID (n = 24) with no minor neurocognitive disorder or Alzheimer’s disease. Assessment protocol: TOLDXtm for ID, Kaufman Brief Intelligence Test Second Edition (K-BIT II), Cambridge Examination for Mental Disorders of Older People with Down’s Syndrome and Others with Intellectual Disabilities (CAMDEX-DS), Weigl’s Color-Form Sorting Test (WCFST), Barcelona Test for Intellectual Disability (BT-ID), and the Behavior Rating Inventory of Executive Function (BRIEF-P). The internal consistency (IDMi and IDMo), factor structure of the different subscales, and relationship between TOLDXtm subscales and other cognitive measures (BT-ID, WCFST, and BRIEF-P) were analyzed. A normative data table with ID population quartiles is provided. TOLDXtm for ID showed a robust one factor structure and coherentassociations with other, related neuropsychological instruments. Significant differences between IDMi and IDMo on movement-related variables like Correct (Corr; p = .002) and Moves (Mov; p = .042) were observed, along with good internal consistency values, Corr (α = .75), Mov (α = .52). Regarding internal consistency, no between-groups differences were observed (all p-value > 0.05). The TOLDXtm for ID is thus an instrument, supported by good validity evidence, to evaluate problem-solving and planning in ID. It distinguishes between individuals with mild and moderate ID, and is highly associated with other measures of executive functioning.
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subjects Addictive behaviors
Adult
Adults
Alzheimer's disease
Behavior
Brain research
Clinical and Health Psychology
Dementia
Down syndrome
Down Syndrome - diagnosis
Down Syndrome - physiopathology
Executive function
Executive Function - physiology
Female
Humans
Intellectual disabilities
Intellectual Disability - diagnosis
Intellectual Disability - physiopathology
Intelligence tests
Learning disabled people
Male
Memory
Mental disorders
Middle Aged
Multicenter studies
Neurocognition
Neuropsychological Tests - standards
Neuropsychology
Normalization
Normative data
Older people
Problem solving
Psychology
Psychometrics - instrumentation
Reproducibility of Results
Validity
Vitamin deficiency
title Validation and Normalization of the Tower of London-Drexel University Test 2nd Edition in an Adult Population with Intellectual Disability
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