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presented by: Heveli Gutierrez & Amanda Bustillos

REFERENCES

WECHSLER NONVERBAL SCALE OF ABILITY

  • Massa, I., & Rivera, V. (2009). Test review: Wechsler, D., & Naglieri, J.A. (2006). Wechsler nonverbal scale of ability. San Antonio, TX: Harcourt assessment. Journal of Psychoeducational Assessment, 27(5), 426-432. doi:10.1177/0734282908329108

"A general cognitive ability assessment tool for individuals' with English language and/or communicative limitations which targets a population whose performance on intelligence batteries might be compromised by standard verbal requirements."

Administration & Scoring

Scoring

Ages 4:0 - 7:11

Ages 8:0 - 21:11

  • Matrices
  • Coding
  • Object Assembly
  • Recognition
  • Matrices
  • Coding
  • Spatial Span
  • Picture Arrangement
  • WNV Scoring Assistant Software
  • Hand Scoring
  • Full Scale IQ (2 & 4 Subtest Battery)
  • Subtest Scores

Purpose:

Strengths

Weaknesses

Practicality

United States

  • Stratified Sample of 1,323 examinees
  • Ages 4:0 - 21:11

Canada

nonverbal measure of ability for culturally and linguistically diverse groups

  • Stratified Sample of 875 examinees
  • Ages 4:0 - 21:11
  • Charles Spearman's theory of general

intelligence (g factor)

  • Cattell-Horn-Carroll Theory
  • Fluid Intelligence/Reasoning

(Gf) for all subtests

  • Short Term Memory (Gsm) for

Spatial Span subtest

  • Visual Processing (Gv) for

Recognition Subtest

  • Publisher: Pearson
  • Author: David Wechsler, PhD & Jack A. Naglieri, PhD
  • Year Published: 2006
  • Price: WNV Complete Kit $737.95
  • Age Range: 4:0 - 21:11
  • Qualification Level C
  • Pen & Paper Administration
  • Administration Time
  • Brief Battery 15 - 20 minutes
  • Full Battery 45 minutes
  • Strong Reliability & Validity BUT for

general population

  • Mastery of Spatial Span Task
  • Only measures one domain (non verbal)

  • Diverse target population
  • Language Variety
  • User friendly & time efficient

(for the most part…)

  • Addresses an underserved population

  • 15 Age Groups (4:0 - 4:11, 5:0 - 5:11, ...)
  • Equal Number of Females & Males in each group
  • Race/Ethnicity: Proportionate to the US Population
  • Education: 5 Education Levels
  • 8 years or less, 9-11 years, 12 years, 13-15 years

16+ years

  • Geographic Regions: Four Major Regions
  • NE, North Central, S, W
  • Test Content
  • Internal Structure
  • Intercorrelation
  • Factor Analysis
  • Relationship with other measures
  • WPPSI-111, WISC-IV, WISC-IV Spanish,

WAIS-111, NNAT-1, UNIT, WIAT-II

  • Internal Consistency
  • Average coefficients from .61 - .87
  • Test-Retest
  • Average corrected range from .61 - .87
  • Interscorer
  • Range from .88 - 1.00

Theoretical Basis

Standardization

Standardization

Reliability

Validity

Matrices

Coding

Object

Assembly

Recognition

Spatial Span

Picture Arrangement

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