EDCO_534_Assessment_Presentation

Slide 1: 

Claudia Centeno Azusa Pacific University Edco 534: Assessment Presentation WISC-IV October 15, 2011

Wechsler Intelligence Scale for Children -Background Information: 

Wechsler Intelligence Scale for Children -Background Information The first edition of the Wechsler Intelligence Scale for Children(WISC) was published in 1949.The first version of the WISC was an extension of the adult intelligence test called the Wechsler-Bellevue Intelligence Scale . Since 1949 the WISC has been revised three times. The first version was published in 1974 (WISC-R) and the second version was published in 1991(WISC-III). The latest edition, is the WISC-IV and was published in 2003.

WISC-IV Revsions : 

WISC-IV Revsions The WISC-IV revisions incorporated and improved the following: Improved its theoretical foundations Improved its psychometric properties (providing recent norms) Enhanced its clinical utility and increase developmental appropriateness Increased its user friendliness Overall revisions in the WISC-IV are a reflection of current research on cognitive development, intellectual assessment and cognitive processes

WISC-IV Purpose: 

WISC-IV Purpose The purpose of the WISC-IV is to measure a child's intellectual and cognitive ability The WISC-IV is designed for children 6years 0 months to 16 years 11 months The assessment can be administered by a educational psychologist or a clinical psychologist The WISC-IV is typically administered by a School Psychologist within a school setting The assessment is administered on a individual basis

WISC-IV TEST REVIEW FORM: 

WISC-IV TEST REVIEW FORM Name of Reviewer :Claudia Centeno Title of Test : Wechsler Intelligence Scale For Children-Fourth Edition (WISC-IV) Author : David Wechsler Publisher :The Psychological Corporation Date : 2003 Purpose of Test : to measure a child's intellectual and cognitive ability

WISC-IV TEST REVIEW FORM: 

WISC-IV TEST REVIEW FORM Development: Standardization: N/A Reliability: Considered to have outstanding reliability. Internal consistency reliability coefficients for the 11 age groups range from .91 to .95 for verbal comprehension, from .91 to .93 for perceptual reasoning, from .90 to .93 for Working Memory, from .81 to .90 for Processing Speed and from .96 to.97 for the Full scale. Validity: Studies of the validity of the WISC-IV indicate that it had adequate construct, concurrent, and predictive validity for many types of children in the age ranges covered by the test. Administration: individual administration required Interpretation of Scoring:  Raw scores are converted to scaled scores per index. Indices are then totaled to provide a full scale IQ. Age: 6 -16 years, 11 months old Grade: dependent on age

Assessment Content: 

Assessment Content Four Indices: 1. Verbal Comprehension Index(VCI) 2. Perceptual Reasoning Index(PRI) 3. Working Memory Index(WMI) 4. Processing Speed Index(PSI) Each assessment index is composed of a series of 3 or 2 subtests. There are 10 subtests total among the four Indices. In addition to this there are also 5 supplemental subtests available in case there is a subtest that is spoiled. The duration of a WISC-IV assessment session is between 65-80 minutes.

Subtest Content- Verbal Comprehension Index: 

Subtest Content- Verbal Comprehension Index The verbal comprhenshion index consists of the following CORE subtests: Similarities Vocabulary Comprehension Supplemental tests for verbal comprehension index: Information Word Reasoning * S upplemental tests are to be used when one of the CORE test has been spoiled

WISC-IV Verbal Comprehension Subtest-Assessment Examples: 

WISC-IV Verbal Comprehension Subtest-Assessment Examples

Subtest Content- Perceptual Reasoning: 

Subtest Content- Perceptual Reasoning The Perceptual Reasoning index consists of the following CORE subtests: Block Design Picture Concepts Matrix Reasoning Supplemental test for Perceptual Reasoning index: Picture Completion *Supplemental tests are to be used when one of the CORE test has been spoiled

Subtest Content- Working Memory: 

Subtest Content- Working Memory The Working Memory index consists of the following CORE subtests: Digit Span Letter Number Sequencing Supplemental test for Working Memory index: Arithmetic *Supplemental tests are to be used when one of the CORE test has been spoiled

Subtest Content-Processing Speed: 

Subtest Content-Processing Speed The Processing Speed index consists of the following CORE subtests: Coding Symbol Search Supplemental tests for verbal comprehension index: Cancellation *Supplemental tests are to be used when one of the CORE test has been spoiled

Slide 13: 

WISC-IV Processing Speed Assessment Examples: Coding and Symbol Search

WISC-IV Structure of Assessment: 

WISC-IV Structure of Assessment

What is needed to Administer the WISC-IV?: 

What is needed to Administer the WISC-IV? Administration Manual Stimulus Book Blocks Symbol Search/Coding Booklet Record Form/Protocol Timer Clipboard Quiet testing environment Example of WISC-IV kit

WISC-IV Administration (order of subtest assessments): 

WISC-IV Administration (order of subtest assessments) CORE SUBTESTS Block Design • Similarities • Digit Span • Picture Concepts • Coding • Vocabulary • Letter – Number Sequencing • Matrix Reasoning • Comprehension Supplemental SUBTESTS (only used when Core Subtest has been spoiled) 1. Picture Completion 12.2. Cancellation 13.3.Information 14.4. Arithmetic 5. Word Reasoning

WISC-IV Record Form/Protocol: 

WISC-IV Record Form/Protocol

WISC-IV SCORING: 

WISC-IV SCORING Each subtest has administration and scoring directions located at the top of the record form/protocol This section of the record form/protocol will state the reverse rule, discontinue rule and scoring guidelines for that particular subtest It is extremely important to review this information prior to administrating the subtest

WISC-IV Administration and Scoring: 

WISC-IV Administration and Scoring it is important to add up the points of the assessment and obtain the student's raw score upon completion of a subtest The raw score is then converted to a scaled score according to the students age (This information is also documented on the first page of the record form/protocol Once all of the subtest scores have been converted to a scaled score this information is then added together to provide a score for each of the indices (this information is then documented on the first page of the protocol, under Sum of Scaled Scores to Composite Score Conversions )

WISC-IV SCORING: 

WISC-IV SCORING Once the Sum of Scaled Scores to Composite Score Conversions table has been completed, a Full Scale IQ composite score is generated It is extremely important to review each individual index composite score for the four core areas of assessment: Verbal Comprehension, Perceptual Reasoning, Working Memory and Processing Speed *Example of Sum of Scaled Scores to Composite Score Conversions (located on Record form/protocol)

WISC-IV SCORING: 

WISC-IV SCORING T he composite scores provide information regarding areas of strength and weakness Areas of strength and weakness can be determined by where the students composite score is located on the Normal Curve diagram For example a student which scores a 96 on the Verbal Comprehension index, would be considered to be "average" in this area. (Diagram is located on final page of record/protocol form)

Refrences: 

Refrences Sattler, J. M. (2008). Assessment of Children. San Diego, Ca: Jerome M. Sattler Publisher, Inc.