differential ability scales sample report differential ability scales sample report

Psychol Assess. 0000051886 00000 n WebWe evaluated the correspondence of contemporaneous MSEL and the DAS-II scores in a mixed sample of children aged 2-10 years with autism spectrum disorder (ASD), non-ASD developmental delays, and typically developing children across the In particular, they often have tro uble with phonological processing, which is a robust predictor of, Abstract A normative typology was developed and applied using multivariate profile analysis of subtest scores of the Universal Nonverbal Intelligence Test (UNIT) standardization sample. -Marit Korkman, PhD, Ursula Kirk, PhD, and Sally Kemp, PhD. Developmental Neuropsychological Assessment, Second Edition (NEPSY-II), Differential Ability Scales, Second Edition Upper & Lower Early Years Battery, Leiter International Performance Scale, Third Edition (Leiter-3), Stanford-Binet Intelligence Scales, Fifth Edition (SB5), Universal Nonverbal Intelligence Test, Second Edition (UNIT-2), Wechsler Intelligence Scale for Children, Fourth Edition (WISC-IV), Wechsler Intelligence Scales for Children, Fifth Edition (WISC-V), Wechsler Adult Intelligence Scale Fourth Edition (WAIS-IV). Res Dev Disabil. Genes (Basel). Epub 2012 Apr 26. Normative scores are provided to compare the childs scores to same-aged peers. HGG Adv. Unauthorized use of these marks is strictly prohibited. 2023 Jan;16(1):122-142. doi: 10.1002/aur.2842. Clipboard, Search History, and several other advanced features are temporarily unavailable. 0000031228 00000 n Accessibility PMC 0000003362 00000 n 0000025366 00000 n These are composed of 20 distinct subsets, which include 17 official website and that any information you provide is encrypted FOIA One current intelligence measure, the Differential Ability Scales, Second Edition (DAS-II), is a test with growing popularity. 79 0 obj <> endobj xref 79 51 0000000016 00000 n Compared DAS II with Mullen Scales of Early Learning (MSEL). 0000008317 00000 n All Rights Reserved. It provides specific information on a childs visual, gross and fine motor, and expressive and receptive language abilities. 0000018612 00000 n Regression line reflect, MeSH WebThe Differential Ability Scales (DAS) is a nationally normed (in the US), and individually administered battery of cognitive and achievement tests. 0000021700 00000 n The limitations of standardized testing for children with developmental delay or cognitive impairment are well known: Tests do not exist that provide developmentally appropriate material along with norms that extend to the lower reaches of ability. 0000015176 00000 n Concerns about the ability-achievement discrepancy method for specific learning disability (SLD) determination led to alternative research-based methods, such as failure to respond to intervention. The WISC-IV has 15 subtests with a core of 10 summarized into four composites including Verbal Comprehension, Perceptual Reasoning, Working Memory and Processing Speed. In addition to the core subtests, ten diagnostic subtests are available to measure verbal and visual working memory, immediate and delayed recall, visual recognition and matching, processing and naming speed, phonological processing, and understanding of basic number concepts. 0000051312 00000 n Dotted line represents a 1:1 relationship between MSEL and DAS-II. Disclaimer. Autism; Cognitive testing; DAS-II; Developmental quotient; IQ; Mullen Scales of Early Learning. Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists, The discriminant validity of the Upper Preschool Level of the Differential Ability Scales (DAS) was studied using 32 at-risk preschoolers (females = 14, males = 18) with a mean age of 57.28 months, The Differential Ability Scales (DAS; Elliott, 1990c) is a comprehensive battery of cognitive and achievement tests that are designed for children and adolescents between the ages of 2 1/2 and 17. Bias in measurement of autism symptoms by spoken language level and non-verbal mental age in minimally verbal children with neurodevelopmental disorders. Two commonly used and interchanged instruments are the Mullen Scales of Early Learning (MSEL), a test of developmental level, and the Differential Ability Scales, second edition (DAS-II), a more traditional cognitive test. The Differential Ability Scales Second Edition (DAS-II; Elliott, 2007) is an individually administered norm-referenced battery of cognitive subtests for children and adolescents ages 2:6 through 17:11. This standardized cognitive assessment measures cognitive and motor abilities in children from birth to 5 years and 6 months and can be used to assess school readiness. The DAS-II can be scored manually or with the Scoring Assistant software included in every kit. Colin Elliott and the other developers of the DAS used the most current statistical procedures in an attempt to create a test that is psychometrically sound. The Differential Ability Scales (DAS) is a scale developed in the British empirical tradition and is purported to be useful in making educational decisions for children. 0000021754 00000 n Concurrent validity of the Differential Ability Scales, second edition, with the Mullen Scales of Early Learning in young children with and without neurodevelopmental disorders. A composite measure known as the Full Scale Intelligence Quotient (FSIQ) is also provided as an overall measure of a childs cognitive abilities. S. Elliott. WebIntellectual ability tests measure the abilities of an individual child relative to the abilities of children in the general population. Participants achieved significantly higher overall scores on the DAS-II and nearly half the sample achieved a higher classification label on the DAS-II. Regression lines reflect age (in months; centered at grand mean of 63.67) entered, Regression line reflects age (in months; centered at grand mean of 63.67) entered, Nonverbal, N=78 (AUT=16, DD=21, TYP=41);, Nonverbal, N=78 (AUT=16, DD=21, TYP=41); Verbal, N=76 (AUT=14, DD=21, TYP=41). WebCurrently in its 2nd edition, the Differential Ability Scales (DAS-II) provide insight into the cognitive abilities children have when learning. WebDifferential Ability Scales (DAS-II) The Differential Ability Scales (DAS-II) were developed as an evaluation tool for the cognitive ability and achievement of children. Education. 0000003563 00000 n The difference between overall scores is suggested to be attributable to a relative weakness in processing speed, which is assessed on the WISC-IV but not the DAS-II. Federal government websites often end in .gov or .mil. 0000037555 00000 n WebDifferential Ability Scales. Children with Williams syndrome who have be taught reading using a systematic phonics approach both decode and comprehend significantly better than children who have been taught using a whole-word approach. Autistic symptomatology was not associated with cognitive scores, while adaptive behavior was positively associated. Zheng S, Kaat A, Farmer C, Thurm A, Burrows CA, Kanne S, Georgiades S, Esler A, Lord C, Takahashi N, Nowell KP, Will E, Roberts J, Bishop SL. 0000011732 00000 n A cluster analysis procedure was used to identify subgroups of children who manifested specific learning disabilities in reading (SLD/R) in terms of performance on a battery of eight language and perceptual tests, finding some significant differences in measures of oral reading and reading comprehension skills. Copyright 2007-2019 Texas Education Agency (TEA). 0000050220 00000 n Children traditionally labeled learning disabled, mildly emotionally disturbed, and mildly mentally retarded are considered within a behavioral rather than a categorical framework. 0000001997 00000 n Cluster scores that comprise the GCA include Verbal Ability, Nonverbal Reasoning Ability, and Spatial Ability (ages 3:6-17:11 only). The following six subgroups were identified: (a) generalized, (b) high functioning, (c) normal, (d) underachievement, (e) borderline, and (f. Cheong PL, Tsai JM, Wu YT, Lu L, Chiu YL, Shen YT, Li YJ, Tsao CH, Wang YC, Chang FM, Huang YH, Sun CW. WebSample APPA Report Sally Smith (not real name) Page - 3 Behavior Rating Inventory of Executive Function (BRIEF) Wechsler Preschool and Primary Scale of Intelligence (WPPSI-IV) Thematic Apperception Test Incomplete Sentences Test FINDINGS This section presents what was found during the evaluation. This cognitive assessment tool can be administered to children from aged 2 years and 6 months to 6 years and 11 months in the Lower Battery and an Upper Batter that can be administered to children up 17 years and 11 months and provides detailed information about your childs cognitive functioning. WebThis cognitive assessment tool can be administered to children from aged 2 years and 6 months to 6 years and 11 months in the Lower Battery and an Upper Batter that can be This measure allows a comparison of language development even in a child who is one to two years old. An overall measure of cognitive abilities, referred to as the Intelligence Quotient (IQ), can also be obtained. This study will examine the implementation of new technology for children with ASD in public schools and will be the first to measure the effectiveness of CAI, and investigate whether adding a new technology on top of existing practices increases or decreases their use. WebDifferential Ability Scales-II View all tests and materials DAS-II Overview Live Webinar 3 Hours A103000072424 Qualification Level C This 3-hour session provides an overview of the DASII focusing on characteristics of the test, subtest administration and scoring, and basic interpretation of results. WebThe Differential Ability Scales Second Edition (DAS-II; Elliott, 2007) is an individually administered, norm-referenced instrument that assesses the cognitive abilities of children and adolescents ages 2 years, 6 months through 17 years, 11 months. Useful features and differences in the administration strategy of DAS are reviewed. Kern et al. SLC13A5 Deficiency Disorder: From Genetics to Gene Therapy. WebDifferential Ability Scales Name: Jane Sample School Age Battery On this administration of the DAS, Jane Sample obtained a Verbal score of 100 (50th percentile, Average), a -Gale H. Roid, Lucy J. Miller, Mark Pomplun, and Chris Koch. These results Price includes up to 40 people per session. Mullen scales of early learning: the utility in assessing children diagnosed with autism spectrum disorders, cerebral palsy, and epilepsy. 2011 Sep;116(5):331-43. doi: 10.1352/1944-7558-116.5.331. Subsequent theorists have WASI-II. Differential Ability Scales. Age Range: Age Range (in years as given in study) 210 years, Sample Size: 47 with autism spectrum disorder (ASD); 28 with non-ASD developmental delays; 43 typically developing children, Concurrent validity between DAS-II and MSEL. wechsler nonverbal sample report . Regression line reflects age (in months; centered at grand mean of 63.67) entered as a covariate for Verbal; age not significant in Nonverbal equation. Cluster Scores: Verbal Ability Cluster; Nonverbal Reasoning Ability Cluster; Spatial Ability Cluster, Age Range: First assessment age 2 years, with re-assessment at age 3, 5, 9, and 19 years, Correspondence between cognitive ability in early childhood and adulthood. It provides specific information about several areas of a childs cognitive abilities, including verbal skills, nonverbal problem-solving, and spatial awareness. WebDifferential Ability Scales developed by Collin D. Elliott reflect theories that focus on measuring diverse skills. Convergent validity of WISC-IV and DAS-II. Autism Res. Instructions are provided in both English and Spanish for the nonverbal subtests. The Differential Ability Scales (DAS; Elliott, 1990a) is one of the latest entries into the field of intelligence tests. AY"6\Zs\=>d )n0_!yS JGq5iJkr&S[j"@{GM.G2d?. Three methods were used to identify unusual profiles: This study investigated the effects of broad cognitive abilities derived from the CattellHornCarroll (CHC) taxonomy, together with the effect of the general factor (g), on Wechsler Individual. 0000049621 00000 n Individual composite scores, including memory, analogic reasoning (thinking about similarities through comparison), spatial awareness, and numerical reasoning can also be collected and are used by psychologists to determine your childs abilities in these areas. The use of the British Ability Scales with children having specific reading difficulties is described and it is suggested that the four abilities recommended for use in computing an IQ in the current BAS Manual are inappropriate for the dyslexic child. 0000029702 00000 n However, curve estimation revealed large mean differences that varied as a function of the child's cognitive ability level. Template Samples. Scores are standard scores with a mean of 100 and standard deviation of 15. 0000001873 00000 n The Vocabulary of Infants with an Elevated Likelihood and Diagnosis of Autism Spectrum Disorder: A Systematic Review and Meta-Analysis of Infant Language Studies Using the CDI and MSEL. 0000002231 00000 n The DAS-II is aligned with Cattell-Horn-Carroll cognitive theory. Equation for Nonverbal (left panel): Y = 19.51 + 2.04X 0.0071X. These are composed of 20 distinct subsets, which include 17 that are cognitive targets and 3 for achievement. Am J Intellect Dev Disabil. 0000004349 00000 n Sattler (2001) Review of the DAS. 0000048655 00000 n National Library of Medicine WebDifferential Ability. The Differential Ability Scales Second Edition (DAS-II; Elliott, 2007) is an individually administered, norm-referenced instrument that assesses the cognitive abilities of children and adolescents ages 2 years, 6 months through 17 years, 11 months. Psychologists use this to provide information on a childs logical problem-solving, verbal and nonverbal knowledge, numerical reasoning, working memory, visual-spatial processing, which is the ability to organize information into meaningful patterns and understanding how they change as they move through space. 0000004039 00000 n 0000030849 00000 n 0000037757 00000 n WebWechslers original IQ scales differentiated verbal from performance (nonverbal) primarily for practical reasons (McGrew & Flanagan, 1998, p. 25). Multistage, ABSTRACT Theory of mind describes the ability to engage in perspective-taking, infer mental states, and predict intentions, behavior, and actions in others. The Differential Ability Scales, Second Edition (DAS-II; Elliott 2007) is an individually administered test designed to measure distinct cognitive abilities for children and adolescents ages 2 years, 6 months to 17 years, 11 months. The WISC-R was administered to a group of learning-disabled (LD) children and the results factor-analyzed. The combination of these scores provide an overall measures of cognitive abilities referred to as the General Conceptual Ability (GCA) and a nonverbal measure, the Special Nonverbal Composite (SNC). Subscales: Overall Composite Scores: General Conceptual Ability (GCA) score; Special Nonverbal Composite (SNC) score The DAT was first published in 1947 and has multiple forms and levels. This nonverbal cognitive assessment tool is used to assess individuals from age 5 to 21 who have language or hearing impairments and also individuals who have diverse cultural and socio-economic backgrounds. Before Wechsler Abbreviated Scale of Intelligence, 2 nd Edition (WASI-II) Ages 6:0 0000030281 00000 n 7-:78Pp[\s1vpfI[* : 'zb%40m?Q7H4'ZE&EYpM[ 2. BMC Pediatr. 0000041718 00000 n 0000024903 00000 n Each composite index combines to form the Full Scale Intelligence Quotient which measures overall intellectual ability. WebThe Nature and Structure of the Das: Questioning the Test's Organizing Model and Use. 0000002502 00000 n The authors concluded that interchanging MSEL and DAS-II scores in research studies without regard to the discrepancy in scores may produce misleading results in both cross-sectional and longitudinal studies of children with and without ASD, and, thus, this practice should be implemented with caution. The scores help in deciding how Preschool-aged children with or at risk for attention deficit hyperactivity disorder (ADHD) experience significant challenges with behavioral, social, and preacademic skills. It consists of two batteries, the Early Years Battery and the School-Age Battery, which were normed for overlapping age ranges to increase the usefulness for children of varying ability levels. This study was an effort to subtype adolescents' learning disabilities using scores on the Woodcock-Johnson Psycho-Educational BatteryRevised to characterize subtypes, suggesting that these students had two specific types of learning disorders. 0000003940 00000 n Cultural Adaptation and Validation of Mullen Scales of Early Learning in Taiwanese children with Autism Spectrum Disorder, Global Developmental Delay, and Typically Developing Children. WebStructural equation modeling (SEM) and commonality analyses were applied to the Differential Ability Scales, Second Edition (DAS-II) standardization and clinical sample data. Unable to load your collection due to an error, Unable to load your delegates due to an error. Notably, the core battery for ages 2:6-3:5 contains only four subtests and may be more useful as a screening instrument for children of this age. 0000029089 00000 n (2015). 1990. Gifted students with LD were more reliant on verbal conceptualization and reasoning than the control students, and demonstrated deficiencies in short-term auditory memory and sound discrimination. Psychologists use the DAS-II to learn about a childs thinking skills, memory, processing speed, spatial awareness, and verbal knowledge. A review of infant growth and psychomotor developmental outcomes after intrauterine exposure to preeclampsia. The WAIS-IV has 15 subtests with a core of 10 summarized into the four composites listed above. Bethesda, MD 20894, Web Policies Regression line reflect age (in months; centered at grand mean of 55.32) entered as a covariate for Verbal; age not significant in Nonverbal equation. Z99 MH999999/ImNIH/Intramural NIH HHS/United States, ZIA MH002868-04/ImNIH/Intramural NIH HHS/United States. The Differential Ability Scales (DAS) was created to provide practitioners with an alternative instrument that may be as effective as WISC-III in picking up specific patterns of learning difficulties. (2015). However, NVIQ was generally stable for the majority of individuals with ASD whose cognitive ability was in the average range. The WAIS-IV has a mean of 100 and standard deviation of 15. The PubMed wordmark and PubMed logo are registered trademarks of the U.S. Department of Health and Human Services (HHS). WebDAS Report A sample report that includes the Differential Ability Scales (DAS), the Test of Memory and Learning (TOMAL), and several other evaluation tools Inconsistent Report WebDifferential Ability Scales Second Edition (DAS-II) is a comprehensive clinical assessment designed to evaluate cognitive abilities in children and adolescents across a broad range of developmental levels. We examined the degree to which child, family, and treatment variables predicted treatment outcomes for reading and math achievement and oppositional behavior in a sample of 135 young, View 2 excerpts, cites methods and background, Narrative development involves an extended development that requires the integration of linguistic, cognitive, and social capacities. The purpose of this study was to determine whether distinct subgroups of children with learning disabilities could be identified using a single, recently developed instrumentthe Differential Ability Scales (DAS). It is individually administered with one or both parents present for the administration. 2022 Mar;122:104158. doi: 10.1016/j.ridd.2021.104158. trailer <]>> startxref 0 %%EOF 81 0 obj<>stream Age: 2 years 6 months to 17 years 11 months, Time to Administer: Core battery: 45-60 minutes; Diagnostic subtests: 30 minutes. Webincluded portions of the Differential Ability Scales (DAS-2), Kaufman Assessment Battery for Children (KABC-2), and Comprehensive Test of Phonological Processing (CTOPP). Semantic Scholar is a free, AI-powered research tool for scientific literature, based at the Allen Institute for AI. Equation for Nonverbal (left panel): Y = 15.30 + 0.98X; R, Nonverbal, N=78 (AUT=16, DD=21, TYP=41); Verbal, N=76 (AUT=14, DD=21, TYP=41). Regression lines reflect age (in months; centered at grand mean of 63.67) entered as a covariate. Psychologists use this to learn about a childs thinking skills, social-emotional skills, and the presence of a learning disability. The DAT contains eight scales: 1) Verbal Reasoning (VR) 2) Numerical Ability (NA) 3) Abstract Reasoning (AR) 4) Perceptual (Clerical) Speed and Accuracy (PSA) 5) Mechanical Reasoning (MR) 6) Space Relations (SR) 7) Spelling (SP) 8) Language Usage (LU) Farmer, C., Golden, C., & Thurm, A. Differential Ability Scales-II (DAS-II) - Pearson Clinical WebThe Differential Ability Scales-Second Edition (DAS-II; Elliott, 2007a), developed and standardized in the United States, is a modern psychological assessment instrument with a longer history than its publication date would suggest (see Rapid Reference 1.1). 2022 Sep 15;13(9):1655. doi: 10.3390/genes13091655. View 6 excerpts, cites background and methods, This longitudinal study tested the veracity of one candidate multiple-deficits account of autism by assessing 37 children with autism (M age = 67.9 months) and 31 typical children (M age = 65.2, View 7 excerpts, cites methods and background. This reaction focuses on and. 0000002038 00000 n 0000050086 00000 n 0000002890 00000 n sharing sensitive information, make sure youre on a federal Governors Committee on People With Disabilities. This reaction focuses on and, By clicking accept or continuing to use the site, you agree to the terms outlined in our. Yields standard scores (M = 100, SD = 15) for composite and cluster scores, T-scores (M = 50, SD = 10) for subtest scores, percentile ranks, confidence intervals, qualitative descriptors, and age equivalents. The .gov means its official. Epub 2015 Apr 20. 2022 Jul 29;13:927847. doi: 10.3389/fpsyg.2022.927847. $>Q')VC2T-$s,EKOw^ _|57us/__|.PaK h)NC0vWw6-42 e,9\`n'yX'fRj8@uU{v+ q-5ROK1L~: Into its second edition (DAS-II), Scores on the DAS-II and MSEL were highly correlated, suggesting that they measure a similar construct. Subjects. 0000025640 00000 n Estimates of intelligence in young children with neurodevelopmental disorders are critical for making diagnoses, in characterizing symptoms of disorders, and in predicting future outcomes. Bookshelf WebThe Differential Ability Scales (DAS; Elliott, 1990c) is a comprehensive battery of cognitive and achievement tests that are designed for children and adolescents between the ages of 2 1/2 and 17 Expand 39 More ups and downs of subtest analysis: Criterion validity of the DAS with an unselected cohort. Ward's method of cluster analysis was used to group 83 school-verified children with learning disabilities from the standardization sample. Belteki Z, Lumbreras R, Fico K, Haman E, Junge C. Int J Environ Res Public Health. Individually administered intelligence measures are commonly used in diagnostic work, but there is a continuing need for research investigating possible test bias among these measures. eCollection 2022. Clinicians should communicate carefully regarding prognosis of cognitive ability to parents of young children with ASD. Theory of mind performance is associated, View 6 excerpts, cites methods and background. Goodspeed K, Liu JS, Nye KL, Prasad S, Sadhu C, Tavakkoli F, Bilder DA, Minassian BA, Bailey RM. An open-label study evaluating the safety, behavioral, and electrophysiological outcomes of low-dose ketamine in children with ADNP syndrome. 2013;2(1):33-42. doi: 10.1080/21622965.2012.682852. eCollection 2022 Oct 13. Good validity . HHS Vulnerability Disclosure, Help View 7 excerpts, cites results, background and methods, Abstract. Bishop, S. L., Farmer, C., & Thurm, A. Epub 2022 Nov 13. Kolevzon A, Levy T, Barkley S, Bedrosian-Sermone S, Davis M, Foss-Feig J, Halpern D, Keller K, Kostic A, Layton C, Lee R, Lerman B, Might M, Sandin S, Siper PM, Sloofman LG, Walker H, Zweifach J, Buxbaum JD. An official website of the United States government. 8600 Rockville Pike We conclude that interchanging MSEL and DAS-II scores without regard to the discrepancy in scores may produce misleading results in both cross-sectional and longitudinal studies of children with and without ASD, and, thus, this practice should be implemented with caution. This is individually adiministered measure of cognitive ability for those aged 6 to 16 years. Method of Administration: Individually administered, norm-referenced measure of cognitive abilities; aligned to the Cattell-Horn-Carroll (CHC) model two overlapping batteries: Early Years (2:6-6:11) and School-Aged (7:0-17:11) View 5 excerpts, cites background and methods, The ability profiles most representative of the school-age norm group for the Differential Ability Scales (DAS; Elliot, 1990a), an individually administered test of cognitive skills, are identified. Careers. government site. and transmitted securely. 0000034407 00000 n Would you like email updates of new search results? Measurement of nonverbal IQ in autism spectrum disorder: Scores in young adulthood compared to early childhood. WebThe Differential Ability Scales (2nd ed., DASII) is unique in that it goes beyond cognitive ability testing to give insight into how a child processes information. Developed The importance of low IQ to early diagnosis of autism. 0000051436 00000 n Investigating the written language abilities of two individuals with Williams syndrome found that, despite the strong similarity between the two individuals in terms of their verbal and non-verbal cognitive abilities and their phonological abilities, their reading and spelling abilities differed by more than 5 grade levels. The major results of the questionnaire study revealed that most of the children were in the lower elementary grades, the distribution of IQs contained a larger proportion with below average ability than is found in the general population of children. Neither was associated with the magnitude of difference between overall scores. Front Psychol. The https:// ensures that you are connecting to the In addition to an overall composite , the General Conceptual Ability (GCA) score, this instrument also yields a Special Nonverbal Composite (SNC) score for children who may have difficulty with oral language. Epub 2022 Jan 12. 0000003463 00000 n WebDifferential Ability Scales, 2 nd Edition (DAS-II) Ages 2:6 17:11. 2022 Jan 27;19(3):1469. doi: 10.3390/ijerph19031469. Indices assessed include Verbal Comprehension, Perceptual Reasoning, Working Memory and Processing Speed. %PDF-1.5 % The site is secure. 0000026154 00000 n Factor scores were derived, and these variables were clustered using the hierarchical group, The purpose of the study was to evaluate the process whereby children are identified as learning disabled (LD) and the validity of subsequent educational placements: (a) a representative sample of, This study examined the extent to which school personnel were able to differentiate learning disabled students from low achievers by examining patterns of scores on psychometric measures. 0000001762 00000 n Abstract. 0000049235 00000 n Appropriate for individuals from 2:6 years to 7:11 years, it measures identifiable skills directly related to educational concerns. Concurrent validity of the WISC-IV and DAS-II in children with autism spectrum disorder. The nature and the structure of children's abilities are considered in the light of evidence from the Differential Ability Scales (DAS), a newly published, individually administered cognitive test, The purposes of this research were, first, to determine whether the varied tests contained in the Differential Ability Scales (DAS) measure the same constructs across its wide range, and, second, to, In a study of the construct validity of composite and selected subtest scores of the Differential Ability Scales (DAS), scores from the DAS, WISC-R, and Stanford Achievement Test were compared for 46, The Differential Ability Scales (DAS) is a scale developed in the British empirical tradition and is purported to be useful in making educational decisions for children. herb oscar anderson that happy feeling,