1. Wechsler Intelligence Scale for Children – Fourth Edition (WISC-IV)
Jaime Knape

2. Three-Stratum Theory of Intelligence
General
Intelligence
(Stratum III)
General Gf Gc Gy Gv Gu Gr Gs Gt
(Stratum II)
Broad
Processing
Speed (RT
Decision
Speed)
General
Memory &
Learning
Broad
Visual
Perception
Broad
Auditory
Perception
Broad
Retrieval
Ability
Broad
Cognitive
Speediness
Fluid
Intelligence
Crystallized
Intelligence
(Stratum I)
Narrow
69 narrow abilities found in data sets analyzed by Carroll
Adapted from K. S. McGrew & D. P. Flanagan (1998). The Intelligence Test Desk Reference (ITDR):
Gf-Gc Cross-Battery Assessment. Boston: Allyn & Bacon.
Stratum II: different loadings to g

3. Wisc-IV test framework
VCI (.85)
PRI (1.00)
Similarities (.83)
Vocabulary (.89)
Comprehension (.75)
Information (.84)
Word Reasoning (.74)
Block Design (.84)
Picture Concepts (.59)
Matrix Reasoning (.45)
Picture Completion (.42)
FSIQ
WMI (.85)
PSI (.55)
Digit Span (.65)
Letter-Number (.74) Sequencing
Arithmetic (.79)
Coding (.81)
Symbol Search (.51)
Cancellation (.48)
Note: Supplemental subtests in italics and do not contribute to FSIQ unless substituted for a core subtest

4. Norming Information Standardization Sample Size: 2,200
11 age groups, with 200 (100 male, 100 female) kids from each age group and an ethnic breakup that matches the March US Census data very closely.

5. Scoring Inter-Individual Scores Intra-Individual Scores FSIQ
Mean 100, SD 15
Intra-Individual Scores
VCI, PRI, PSI, WMI
Mean 10, SD 3
(Strengths/Weaknesses)- Compare each individual subtest with the mean of all subtests

6. Reliability
Internal reliability for subtests ranged from .88 (PSI) to .97 (FSIQ).
Test- Retest Reliability coefficients ranged from .76 on picture concepts to .92 on vocabulary.
Inter-rater reliability by experts was generally .98, with Comprehension dipping to .95.

7. Convergent Validity
Adapted from: Flanagan, D., & Kaufman, A. (2009). Essentials of Wisc-IV Assessment (2nd ed.). Hoboken, NJ: John Wiley & Sons Inc.

8. Examples of VCI Similarities: Milk – Water Frown – Smile Space – Time
Vocabulary: umbrella, absorb, garrulous
Comprehension: What would you do if your neighbor’s house started on fire?

9. Examples of Pri Block Design (BD): Picture completion Student Desk
Candle
Table Lamp
Beach ball
Basketball Hoop
Chalkboard

10. Examples of PRI continued
Matrix Reasoning

11. Examples Of WMI Digits Forward Digits Backward
Letter-Number Sequencing
Ex. 5-A-2-B AB25
S-3-K-4-Y-1-G GKSY or GLSY134
Digits Forward Digits Backward
2-9 numbers numbers

12. Examples of PSI Coding Symbol Search zx bvpfk YES NO
target group search group

13. References
Flanagan, D., & Kaufman, A. (2009). Essentials of Wisc-IV Assessment (2nd ed.). Hoboken, NJ: John Wiley & Sons Inc.
McGrew, K & Flanagan, D (1998). The Intelligence Test Desk Reference (ITDR): Gf-Gc Cross-Battery Assessment. Boston: Allyn & Bacon.
Wechsler, D., Kaplan, E., Fein, D., Kramer, \ J., Morris, R., & Delis, D. (2001) [Review of the test Wechsler Intelligence Scale for Children Fourth Edition Integrated]. In The eleventh mental measurements yearbook. Retrieved April 11, 2012, from wm.edu/ehost.