WPPSI Ancillary Index Scores 1 — Questions and Answers
Question 1: What is the primary purpose of the Vocabulary Acquisition Index (VAI) on the WPPSI-IV?
- To measure nonverbal reasoning skills
- To assess receptive and expressive vocabulary (Correct answer)
- To evaluate processing speed
- To measure working memory capacity
Correct answer: To assess receptive and expressive vocabulary
The VAI is specifically designed to measure both receptive vocabulary (Receptive Vocabulary subtest) and expressive vocabulary (Picture Naming subtest).
Question 2: Which two subtests comprise the Vocabulary Acquisition Index (VAI)?
- Block Design and Object Assembly
- Similarities and Vocabulary
- Receptive Vocabulary and Picture Naming (Correct answer)
- Picture Memory and Zoo Locations
Correct answer: Receptive Vocabulary and Picture Naming
The VAI consists of Receptive Vocabulary (measuring understanding of words) and Picture Naming (measuring expressive vocabulary).
Question 3: What is the primary purpose of the Nonverbal Index (NVI) on the WPPSI-IV?
- To assess vocabulary without reading
- To provide an intelligence estimate that minimizes verbal demands (Correct answer)
- To measure fluid reasoning exclusively
- To evaluate processing speed in isolation
Correct answer: To provide an intelligence estimate that minimizes verbal demands
The NVI provides a measure of general cognitive ability while minimizing the need for verbal instructions and verbal responses, making it useful for children with language barriers or hearing impairments.
Question 4: For ages 4:0–7:7, how many subtests comprise the Nonverbal Index (NVI)?
- 2
- 4
- 6 (Correct answer)
- 8
Correct answer: 6
For ages 4:0–7:7, the NVI includes six subtests: Block Design, Object Assembly, Matrix Reasoning, Picture Concepts, Bug Search, and Cancellation.
Question 5: Which cognitive processes does the General Ability Index (GAI) intentionally exclude compared to the Full Scale IQ?
- Verbal comprehension and visual spatial processing
- Fluid reasoning and knowledge acquisition
- Working memory and processing speed (Correct answer)
- Receptive and expressive language
Correct answer: Working memory and processing speed
The GAI excludes working memory and processing speed subtests, providing a purer measure of higher-level cognitive abilities (verbal comprehension, visual spatial, and fluid reasoning).
Question 6: What does a significant discrepancy between the General Ability Index (GAI) and the Cognitive Proficiency Index (CPI) suggest clinically?
- The child has superior verbal abilities
- There may be a meaningful difference between higher-order cognitive abilities and cognitive efficiency (Correct answer)
- The child requires subtest substitution
- The FSIQ is always invalid in this scenario
Correct answer: There may be a meaningful difference between higher-order cognitive abilities and cognitive efficiency
A significant GAI-CPI discrepancy suggests the child's higher-order reasoning abilities differ meaningfully from their cognitive efficiency, which may indicate processing difficulties.
Question 7: Which subtests make up the Cognitive Proficiency Index (CPI) on the WPPSI-IV?
- Similarities, Vocabulary, Block Design, and Object Assembly
- Receptive Vocabulary, Picture Naming, Bug Search, and Cancellation
- Picture Memory, Zoo Locations, Bug Search, and Cancellation (Correct answer)
- Matrix Reasoning, Picture Concepts, Bug Search, and Cancellation
Correct answer: Picture Memory, Zoo Locations, Bug Search, and Cancellation
The CPI consists of the working memory subtests (Picture Memory and Zoo Locations) and the processing speed subtests (Bug Search and Cancellation).
WPPSI Ancillary Index Scores 1
What is the primary purpose of the Vocabulary Acquisition Index (VAI) on the WPPSI-IV?