WAIS Perceptual Reasoning Index (PRI) 3 — Questions and Answers
Question 1: Which statistical approach is used to determine whether an individual examinee's PRI–VCI discrepancy is meaningful?
- Comparing the difference to the critical value for statistical significance in the WAIS-IV normative tables (Correct answer)
- Dividing the PRI by the VCI to produce a ratio score
- Averaging the PRI and VCI to produce a Full Scale IQ
- Subtracting the PRI from the VCI and comparing to 15 points
Correct answer: Comparing the difference to the critical value for statistical significance in the WAIS-IV normative tables
Clinicians use WAIS-IV normative tables that specify how large a difference must be to reach statistical significance (e.g., p < .05 or p < .01) based on the standardization sample.
Question 2: When scoring Block Design, which type of error results in a time-bonus point being forfeited even if the design is ultimately correct?
- Completing the design after the time limit expires (Correct answer)
- Rotating a single block slightly off-axis
- Asking for clarification mid-trial
- Starting the design with the wrong block
Correct answer: Completing the design after the time limit expires
Block Design awards time-bonus points only for correct responses completed within specific time thresholds; exceeding the time limit forfeits any bonus.
Question 3: Matrix Reasoning on the WAIS-IV differs from Raven's Progressive Matrices primarily in that it:
- Uses a multiple-choice response format with a limited set of options rather than an open construction response (Correct answer)
- Requires verbal explanation of the selected answer
- Is untimed with no discontinue rule
- Presents only geometric shapes rather than varied abstract patterns
Correct answer: Uses a multiple-choice response format with a limited set of options rather than an open construction response
WAIS-IV Matrix Reasoning uses a closed multiple-choice format; Raven's has an open-ended response page of options with a different presentation style.
Question 4: Which neuropsychological condition is most consistently associated with selective impairment on Block Design despite relatively intact Matrix Reasoning?
- Right posterior parietal lesions (Correct answer)
- Left frontal lesions
- Bilateral temporal lobe damage
- Anterior cingulate damage
Correct answer: Right posterior parietal lesions
Right posterior parietal regions are critical for visuospatial construction; lesions there impair Block Design more than abstract pattern-matching tasks like Matrix Reasoning.
Question 5: In the WAIS-IV standardization sample, the average PRI score for adults aged 65–69 compared to adults aged 20–24 typically shows:
- A notable decline, reflecting age-related decrements in fluid reasoning (Correct answer)
- No change, as perceptual reasoning is highly resistant to aging
- An increase, because older adults have more visual experience
- A bimodal distribution with some improvement and some decline
Correct answer: A notable decline, reflecting age-related decrements in fluid reasoning
Fluid intelligence, including perceptual reasoning, typically declines with age, and WAIS-IV norms reflect lower average PRI scores in older age bands.
Question 6: What is the primary purpose of including a supplemental subtest like Figure Weights in the WAIS-IV PRI?
- To replace a core subtest if it was spoiled or the examinee was unable to complete it (Correct answer)
- To boost the PRI composite score automatically
- To add a verbal component to the PRI
- To serve as the primary measure of spatial construction
Correct answer: To replace a core subtest if it was spoiled or the examinee was unable to complete it
Figure Weights can substitute for a core PRI subtest if administration was invalidated, allowing a valid composite to still be calculated.
Question 7: Which aspect of Block Design performance is captured by the Block Design No Time Bonus (BDN) process score?
- Spatial construction accuracy independent of processing speed (Correct answer)
- The number of rotation errors made during construction
- The examinee's ability to self-correct broken configurations
- Bonus points earned for rapid accurate completion
Correct answer: Spatial construction accuracy independent of processing speed
BDN scores Block Design responses as correct or incorrect without applying time-bonus points, isolating spatial construction accuracy from speed.
WAIS Perceptual Reasoning Index (PRI) 3
Which statistical approach is used to determine whether an individual examinee's PRI–VCI discrepancy is meaningful?