Overview - Pearson Clinical Batteries Upper Level 3:6 – 6:11 Lower Level 2:6 – 3:5 Early Years 2:6 ... Overview of the Differential Ability Scales-Second Edition Gloria Maccow,

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  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

    Copyright 2011, Pearson, Inc., or its affiliates. All rights reserved. 1

    Overview

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    AgendaAgenda

    describe the purpose of the DAS-II; describe the structure of the DAS-II

    and features of the subtests; describe the general directions for

    administration; and describe scoring and interpretation.

    3 | Copyright 2011. All rights reserved.

    AuthorAuthors Perspectives Perspective

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

    Copyright 2011, Pearson, Inc., or its affiliates. All rights reserved. 2

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    Description of DASDescription of DAS--IIII

    Individually administered clinical instrument consisting of 20 subtests.

    Designed to assess cognitive abilities of children and adolescents from 2 years 6 months through 17 years 11 months.

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    Purposes and UsesPurposes and Uses

    ClassificationThe composite score can be used in making classification and placement decisions.

    DiagnosticA reliable profile of intra-individual cognitive strengths and weaknesses is needed to determine, for example, why a child is struggling to learn to read and what methods we can use to improve learning.

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    Historical PerspectiveHistorical Perspective

    1990 Development of Differential Ability Scales [based on BAS approach] for use in the United States.

    2006 Publication of Differential Ability Scales-II.

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

    Copyright 2011, Pearson, Inc., or its affiliates. All rights reserved. 3

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    G

    Gc Gv Glr Gs Gsm GaGf

    Gc Crystallized (verbal) intelligenceGf Fluid Intelligence/ReasoningGv Visual-Spatial ProcessingGlr Long-term Storage and RetrievalGs Cognitive Processing SpeedGsm Short-term MemoryGa Auditory Processing

    Structure of AbilitiesStructure of Abilities

    Cattell-Horn and Carroll (CHC) Broad Cognitive Abilities

    Early Years BatterySchool-Age Battery

    Core SubtestsDiagnostic Subtests

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    DASDAS--II: BatteriesII: Batteries

    3:6 6:11Upper Level

    2:6 3:5Lower Level

    2:6 - 6:11Early Years

    7:0 - 17:11School-Age

    AgesBattery

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

    Copyright 2011, Pearson, Inc., or its affiliates. All rights reserved. 4

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    Early Years BatteryEarly Years BatteryAges 2:6 Ages 2:6 3:5 (Lower Level)3:5 (Lower Level)

    Core Subtests

    GCA

    Diagnostic Subtests

    Verbal ComprehensionNaming Vocabulary

    Picture SimilaritiesPattern Construction

    Recall of Digits ForwardRecognition of PicturesEarly Number Concepts

    Verbal Ability

    Nonverbal Ability

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    Early Years BatteryEarly Years BatteryAges 3:6 Ages 3:6 6:11 (Upper Level)6:11 (Upper Level)

    Core Subtests

    GCA

    Verbal ComprehensionNaming Vocabulary

    Picture SimilaritiesMatrices

    Pattern ConstructionCopying

    Verbal Ability

    Nonverbal Reasoning Ability

    Spatial Ability

    Supplemental ScoreSpecial Nonverbal Composite

    PSim + PCon + Mat + Copy

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    Early Years BatteryEarly Years BatteryAges 3:6 Ages 3:6 6:11 (Upper Level)6:11 (Upper Level)

    Diagnostic SubtestsEarly Number Concepts

    Matching Letter-Like FormsPhonological Processing

    Recall of Sequential OrderRecall of Digits Backward

    Speed of Information ProcessingRapid Naming

    School Readiness

    Working Memory

    Processing Speed

    Recall of Objects-ImmediateRecall of Objects-DelayedRecall of Digits ForwardRecognition of Pictures

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

    Copyright 2011, Pearson, Inc., or its affiliates. All rights reserved. 5

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    Early Years BatteryEarly Years BatteryDiagnostic Subtests by Age GroupDiagnostic Subtests by Age Group

    Recall of Objects-ImmediateRecall of Objects-DelayedRecall of Digits ForwardRecognition of PicturesEarly Number Concepts

    Matching Letter-Like Forms

    Recall of Objects-ImmediateRecall of Objects-DelayedRecall of Digits ForwardRecognition of Pictures

    Ages 5:0 6:11 only Ages 4:0 4:11 only

    Ages 3:6 3:11 only

    Recall of Digits ForwardRecognition of PicturesEarly Number Concepts

    SchoolSchool--Age BatteryAge BatteryAges 7:0 Ages 7:0 17:1117:11

    Core Subtests

    GCA

    Word DefinitionsVerbal Similarities

    MatricesSequential and

    Quantitative Reasoning

    Recall of DesignsPattern Construction

    Verbal Ability

    Nonverbal Reasoning Ability

    Spatial Ability

    Supplemental ScoreSpecial Nonverbal Composite

    RDes + PCon + Mat + SQR

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    SchoolSchool--Age BatteryAge BatteryAges 7:0 Ages 7:0 17:11 (Upper Level)17:11 (Upper Level)

    Diagnostic Subtests

    Recall of Objects-ImmediateRecall of Objects-DelayedRecall of Digits ForwardRecognition of Pictures

    Recall of Sequential OrderRecall of Digits Backward

    Speed of Information ProcessingRapid Naming

    Working Memory

    Processing Speed

    Phonological ProcessingNote: Phonological Processing may be administered up to age 12-11 as a diagnostic subtest.

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

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    Median Administration TimeMedian Administration Time

    Core Subtests

    Early Years [Ages 2:6-3:5] 20 min.Early Years [Ages 3:6-6:11] 31 min.School Age [7:0-17:11] 39 min.

    Diagnostic Subtests

    Working Memory 12 min.Processing Speed 9 min.School Readiness 17 min.

    Test Materialsp. 14 ADM. Manual

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    DASDAS--II MaterialsII Materials

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

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    General InformationBattery SelectionSubtest Selection

    Subtest AdministrationItem Sets

    Basal and CeilingFixed Start Point and Discontinue Rule

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    Ensure understanding of the taskEnsure understanding of the task

    Repeat or rephrase directions or items Not for short-term/working memory tasks

    Demonstrate with samples

    Teach after failure on designated items

    Question or encourage more elaborate responses

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

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    Item SetsItem Sets

    All core subtests Diagnostic Subtests Recognition of

    Pictures, Early Number Concepts, Matching Letter-Like Forms

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    Item SetsItem Sets

    Reduce administration time Make maximum use of childs energy

    and efforts Facilitate rapport

    In general, use set of items with

    at least 3 passes and at least 3 failures - (3x3 rule).

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    Decision Points Decision Points

    When decision point reached

    1. Stop subtest when child has failed at least 3 items of all items administered and has passed at least 3 items of all items administered.

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

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    Decision PointsDecision Points

    When decision point reached

    2. Continue with subtest and administer more difficult items if the child has not failed at least 3 items prior to reaching the item set decision point.

    (Fewer than 3 failures, continue)

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    Decision Points Decision Points

    When decision point reached

    3. Go back to an earlier start point if the child has not passed at least 3 items at the decision point. Administer items in forward sequence.

    (Fewer than 3 passes, go back)

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    Clarifying Alternative Stop RulesClarifying Alternative Stop Rules

    When alternative stop point criterion met

    if at least 3 passes on all items, STOP

    if fewer than 3 passes on all items given, GO BACK to an earlier start point.

  • Overview of the Differential Ability Scales-Second EditionGloria Maccow, Ph.D., Assessment Training Consultant

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    Alternative Stop Point RuleAlternative Stop Point Rule

    When using alternative stop point, score remaining unadministered items as if administered and failed (p. 37 Adm. Manual).

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