Wechsler ScalesWechsler Scales

Security and TermsSecurity and Terms

Test securityTest security TermsTerms

FloorFloor CeilingCeiling Basal and ceiling rulesBasal and ceiling rules

The Wechsler ScalesThe Wechsler Scalesof Intelligenceof Intelligence

Wechsler defined intelligence as “the aggregate Wechsler defined intelligence as “the aggregate or global capacity of the individual to act or global capacity of the individual to act purposefully, to think rationally and to deal purposefully, to think rationally and to deal effectively with his environment”effectively with his environment”

Three scalesThree scales WAISWAIS WISCWISC WPPSIWPPSI

Wechsler Adult IntelligenceWechsler Adult IntelligenceScale-IVScale-IV

Ages 16-90.11Ages 16-90.11 FSIQ ranges 40-160FSIQ ranges 40-160 Mean, SDMean, SD 60-90 min to administer60-90 min to administer Core and supplemental subtestsCore and supplemental subtests

10 core and 5 supplemental10 core and 5 supplemental When to use supplemental?When to use supplemental?

Wechsler Adult IntelligenceWechsler Adult IntelligenceScale-IVScale-IV

Verbal Comprehension Verbal Comprehension IndexIndex SimilaritiesSimilarities VocabularyVocabulary InformationInformation

Perceptual Reasoning Perceptual Reasoning IndexIndex Block designBlock design Matrix reasoningMatrix reasoning Visual puzzlesVisual puzzles

Working Memory IndexWorking Memory Index Digit SpanDigit Span ArithmeticArithmetic

Processing Speed IndexProcessing Speed Index Symbol SearchSymbol Search CodingCoding

WAIS-IV StandardizationWAIS-IV Standardization

ReliabilityReliability ValidityValidity Strengths and Criticisms of testStrengths and Criticisms of test ErrorsErrors

Wechsler IntelligenceWechsler IntelligenceScale for Children-VScale for Children-V

20142014 Ages 6 to 16.11Ages 6 to 16.11 About 60 minutes to administerAbout 60 minutes to administer 21 subtests

10 primary, 6 secondary, 5 complementary

7 of 10 primary for FSIQ

Descriptive Classifications Descriptive Classifications

Composite Score Range

WISC–V Descriptive Classification

Traditional Descriptive Classification (“Old”)

130 and above Extremely High Very Superior

120–129 Very High Superior

110–119 High Average High Average

90–109 Average Average

80–89 Low Average Low Average

70–79 Very Low Borderline

69 and below Extremely Low Extremely Low

FSIQFSIQ

7 subtests7 subtests Summarizes ability across diverse Summarizes ability across diverse

set of cognitive functionsset of cognitive functions Most representativeMost representative

VCIVCI

Ability to access and apply acquired Ability to access and apply acquired word knowledgeword knowledge

Ability to verbalize meaningful Ability to verbalize meaningful concepts, think about verbal concepts, think about verbal information, and express self in information, and express self in wordswords

VSIVSI

Ability to evaluate visual details and Ability to evaluate visual details and understand visual spatial relationships understand visual spatial relationships in order to construct geometric designs in order to construct geometric designs from a modelfrom a model

Requires visual spatial reasoning, Requires visual spatial reasoning, integration and synthesis of part-whole integration and synthesis of part-whole relationships, attentiveness to visual relationships, attentiveness to visual detail, and visual-motor integrationdetail, and visual-motor integration

FRIFRI

Ability to detect the underlying Ability to detect the underlying conceptual relationship among visual conceptual relationship among visual objects and use reasoning to identify objects and use reasoning to identify and apply rules. and apply rules.

Identification and application requires Identification and application requires inductive and quantitative reasoning, inductive and quantitative reasoning, broad visual intelligence, simultaneous broad visual intelligence, simultaneous processing, and abstract thinkingprocessing, and abstract thinking

WMIWMI

Ability to register, maintain, and Ability to register, maintain, and manipulate manipulate visual*visual* and auditory and auditory information in conscious awareness, information in conscious awareness, which requires attention and which requires attention and concentration, as well as visual and concentration, as well as visual and auditory discriminationauditory discrimination

PCIPCI

Speed and accuracy of visual Speed and accuracy of visual identification, decision making, and identification, decision making, and decision implementation. decision implementation.

Performance is related to visual scanning, Performance is related to visual scanning, visual discrimination, short-term visual visual discrimination, short-term visual memory, visuomotor coordination, and memory, visuomotor coordination, and concentrationconcentration

Ability to rapidly identify, register, and Ability to rapidly identify, register, and implement decisions about verbal stimuliimplement decisions about verbal stimuli