Weschler Flashcards
Current Wechsler tests types
WAIS-IV adult
WISC V child 2014
WPPSI-iv preschool 2012
Wechsler Bellevue Scale
Explanation and how scored
Performance Scale - non-verbal intelligence
Number of points assigned to items
WAIS-IV
number of indexes
scoring how to get from sub-test scores to index score
reliability
4 index composite scores plus g
high internal, test-retest, and FSIQ reliability
Score: raw score from sub-test convert to scaled score
add scaled scores from corresponding sub-test tp get composite index score
convert to index score.
WISC 4 Who is for? What is mean and sd? reliability of sub-tests? validity of this revision?
Full Scale IQ for children
mean = 100
sd = 15
High reliability of full scale; sub-test reliability varies
validity: high correlation with predecessors
What does the Wechsler Performance scale seek to overcome
bias of language, culture and education
What are the four Wechsler sub-tests
Verbal Comprehension
Perceptual Organisation
Working memory
Processing Speed
Three Advantages of the Wechsler Scale WAIS
Made for adults - content validity for adults,
doesn’t handicap older adults,
considers intellectual deteriotion
Two Advantage of the non-verbal performance scale
non-verbal performance tasks are grouped
non-verbal measure of intelligence
3 advantages of the point scale
Credit recieved for each item passed
Items grouped by content
yeilds multiple scores
Standardization of WAIS-IV
Stratified 2200 adults 13 age groups 16 years to 90 years 13 speciality groups reresentative of USA 2005 census
Interpretation of Wecshler test (3 methods)
Index comparison
Verbal IQ vs Performance IQ
Pattern analysis - evaluate langauge difference between sub-test scaled scores; prone to errors, unreliable
WISC-V psychometrics and factor analysis results
standardisation, reliability, validity, support high
special group studies; ASD, ADHD, TBI, SLD
WPPSI-IV Ages 2.6 - 7.7
psychometrics
high reliability
grounded in modern theory
factor analysis best fits a bifactor model
Sub-tests in the Wechsler Verbal-Comprehension index
Vocabulary
Similarities
Information
Sub-tests in the Wechsler Perceptual Organisation Index
Picture completion
block design
matrix reasoning
