Wechsler Adult Intelligence Scale (WAIS) Exam — Questions and Answers

Question 1: Which of the following is LEAST likely to be a primary cognitive skill measured by the Symbol Search subtest of the PSI?

Sustained attention and concentration
Decision-making speed
Visual scanning and discrimination
Verbal abstract reasoning (Correct answer)

Correct answer: Verbal abstract reasoning

Symbol Search requires the examinee to quickly scan a search group of symbols and determine if a target symbol is present. This task relies heavily on visual scanning, discrimination, decision-making speed, and sustained attention. Verbal abstract reasoning, the ability to understand and work with abstract verbal concepts, is a primary function of the Verbal Comprehension Index (VCI), not the PSI.

Question 2: PSI scores tend to show the steepest age-related decline beginning around which decade of life?

50s–60s (Correct answer)
30s
70s–80s
20s

Correct answer: 50s–60s

Processing speed begins a more pronounced decline in the 50s–60s, accelerating further into older adulthood.

Question 3: Which two subtests make up the primary Fluid Reasoning Index (FRI) on the WAIS-5?

Similarities and Matrix Reasoning
Block Design and Matrix Reasoning
Figure Weights and Visual Puzzles
Matrix Reasoning and Figure Weights (Correct answer)

Correct answer: Matrix Reasoning and Figure Weights

The primary FRI is derived from Matrix Reasoning and Figure Weights, which tap inductive and quantitative reasoning.

Question 4: A clinician sees variable effort: PVTs are passed in the morning but failed in the afternoon. What is the best interpretation?

The afternoon PVTs were given wrong
Effort can vary within a session, so validity should be judged for each part of testing (Correct answer)
The examinee has a reading disorder
Validity is a stable trait and only the morning results count

Correct answer: Effort can vary within a session, so validity should be judged for each part of testing

Effort can change over time, which is why ongoing validity checks are recommended through the whole evaluation.

Question 5: What is the mean and standard deviation of FRI and VSI composite scores on the WAIS-5?

Mean 100, SD 15 (Correct answer)
Mean 10, SD 3
Mean 100, SD 10
Mean 50, SD 10

Correct answer: Mean 100, SD 15

Like all Wechsler index scores, the FRI and VSI use a standard-score metric with a mean of 100 and SD of 15.

Question 6: On the WAIS-IV, which PRI subtest has the highest loading on a general spatial visualization factor?

Figure Weights
Picture Completion
Matrix Reasoning
Visual Puzzles (Correct answer)

Correct answer: Visual Puzzles

Visual Puzzles was specifically designed and validated as a strong measure of spatial visualization and mental synthesis ability.

Question 7: An examinee's VCI score of 130 falls at approximately which percentile?

91st
84th
98th (Correct answer)
75th

Correct answer: 98th

A VCI of 130 is two standard deviations above the mean of 100 (SD=15), placing it at the 98th percentile.

Question 8: The core subtests that comprise the Working Memory Index (WMI) on the WAIS-IV are:

Digit Span and Letter-Number Sequencing
Arithmetic and Symbol Search
Letter-Number Sequencing and Cancellation
Digit Span and Arithmetic (Correct answer)

Correct answer: Digit Span and Arithmetic

On the WAIS-IV, the two core subtests used to calculate the Working Memory Index are Digit Span and Arithmetic. Letter-Number Sequencing is a supplemental subtest for this index.

Question 9: A person scores far below norms on Coding, yet their everyday work involves fast data entry. What might this mismatch suggest?

A possible validity concern that needs more checking (Correct answer)
Superior processing speed
Proof of a learning disability
Normal test anxiety only

Correct answer: A possible validity concern that needs more checking

Scores that do not match real-world function are a red flag for noncredible performance and need confirmation with PVTs.

Question 10: Which WAIS-IV subtest requires an examinee to define words presented orally and in print?

Similarities
Comprehension
Information
Vocabulary (Correct answer)

Correct answer: Vocabulary

The Vocabulary subtest asks examinees to define words, tapping word knowledge, verbal concept formation, and long-term memory.

Question 11: What is the primary purpose of the WAIS?

Diagnose physical health issues
Assess overall intellectual functioning in adults (Correct answer)
Provide vocational training
Measure academic achievement

Correct answer: Assess overall intellectual functioning in adults

The primary purpose of the WAIS is to provide a comprehensive evaluation of an individual's cognitive abilities and overall intellectual functioning in adults. It yields a Full-Scale IQ score, along with several index scores, to give a detailed profile of an adult's intellectual strengths and weaknesses across various cognitive domains.

Question 12: What is the primary purpose of discrepancy analysis in WAIS-IV interpretation?

To calculate the examinees overall FSIQ score from raw subtest scores
To compare the examinees scores to those of a clinical reference group only
To determine whether differences between index scores are statistically significant and clinically meaningful (Correct answer)
To identify which subtests should be excluded from composite score calculation

Correct answer: To determine whether differences between index scores are statistically significant and clinically meaningful

Discrepancy analysis examines whether differences between index or subtest scores exceed what would be expected by chance, helping clinicians identify genuine cognitive strengths and weaknesses.

Question 13: A clinician notes an examinee scores significantly lower on Vocabulary than on Information. What might this pattern suggest?

Superior processing speed
Better rote factual knowledge than expressive word knowledge (Correct answer)
Better abstract reasoning than verbal ability
Stronger working memory than language skills

Correct answer: Better rote factual knowledge than expressive word knowledge

Higher Information relative to Vocabulary may reflect strong factual/general knowledge with weaker expressive vocabulary or word retrieval.

Question 14: Which of the following cognitive abilities is PRIMARILY assessed by the Verbal Comprehension Index (VCI) of the WAIS?

Acquired knowledge, verbal reasoning, and concept formation. (Correct answer)
The ability to hold and manipulate information in short-term memory.
The speed and accuracy of visual scanning and motor response.
Fluid reasoning and problem-solving in novel situations.

Correct answer: Acquired knowledge, verbal reasoning, and concept formation.

The Verbal Comprehension Index (VCI) is designed to measure an individual's crystallized intelligence. This includes their ability to understand and use spoken language, the breadth and depth of knowledge acquired from their environment, and verbal concept formation and reasoning.

Question 15: Traumatic brain injury (TBI) most consistently impairs which WAIS index first and most severely?

Perceptual Reasoning Index
Working Memory Index
Verbal Comprehension Index
Processing Speed Index (Correct answer)

Correct answer: Processing Speed Index

TBI reliably and disproportionately reduces processing speed, making PSI the index most sensitive to acquired brain injury.

Question 16: Which factor does the Cancellation subtest measure that Coding does NOT primarily emphasize?

Auditory processing
Graphomotor speed
Paired-associate learning
Visual scanning and selective attention (Correct answer)

Correct answer: Visual scanning and selective attention

Cancellation emphasizes random and structured visual scanning with selective attention to targets, beyond the graphomotor component of Coding.

Question 17: The PSI composite is computed by summing scaled scores and converting to a standard score with mean 100 and SD of:

15 (Correct answer)
3
20
10

Correct answer: 15

Like all WAIS index scores, the PSI has a mean of 100 and a standard deviation of 15.

Question 18: The PSI is most sensitive to neurological conditions because processing speed is closely linked to:

Long-term memory consolidation
White matter integrity and neural efficiency (Correct answer)
Verbal working memory capacity
Crystallized intelligence

Correct answer: White matter integrity and neural efficiency

Processing speed depends heavily on white matter tract efficiency, making it sensitive to neurological disruption.

Question 19: What does the Verbal Comprehension domain primarily assess?

Knowledge of word meanings and verbal reasoning (Correct answer)
Memory span for numbers and letters
The ability to quickly process and interpret visual information
Visual-motor coordination

Correct answer: Knowledge of word meanings and verbal reasoning

The Verbal Comprehension domain of the WAIS primarily assesses an individual's ability to understand and use verbal information. This includes evaluating their vocabulary knowledge, verbal reasoning skills, and capacity to comprehend and express verbal concepts effectively, reflecting their crystallized intelligence.

Question 20: Which population is most likely to fail PVTs at standard cutoffs even when giving genuine effort?

College students with mild anxiety
Patients with moderate-to-severe dementia (Correct answer)
Healthy older adults
Adults with a mild concussion who have recovered

Correct answer: Patients with moderate-to-severe dementia

Severe genuine cognitive impairment, such as dementia, can lower PVT scores and lead to false positives.

Question 21: An examiner is administering the WAIS-IV to a client who reports significant test anxiety. On which of the following indices is the client's performance MOST likely to be negatively impacted by their anxiety?

Full Scale IQ (FSIQ)
Verbal Comprehension Index (VCI)
Perceptual Reasoning Index (PRI)
Working Memory Index (WMI) (Correct answer)

Correct answer: Working Memory Index (WMI)

The Working Memory Index (WMI) is highly susceptible to factors like anxiety and poor concentration. The subtests, such as Digit Span and Arithmetic, require sustained attention and mental control, which are often disrupted by anxiety.

Question 22: Which combination of core subtests on the WAIS-IV is used to calculate the Processing Speed Index (PSI)?

Coding and Symbol Search (Correct answer)
Digit Span and Arithmetic
Vocabulary and Similarities
Block Design and Matrix Reasoning

Correct answer: Coding and Symbol Search

The Processing Speed Index (PSI) on the WAIS-IV is derived from the scaled scores of two core subtests: Coding and Symbol Search. These subtests measure the speed and accuracy of visual identification, decision-making, and decision implementation.

Question 23: Why does current guidance recommend giving several PVTs across an evaluation instead of just one?

Insurance companies require at least five PVTs
Several PVTs raise the examinee's FSIQ
Validity can change during testing, and failing two or more PVTs is more reliable than failing one (Correct answer)
A single PVT always gives a false positive

Correct answer: Validity can change during testing, and failing two or more PVTs is more reliable than failing one

Effort can vary over a session, and failing two or more independent PVTs raises confidence that performance was invalid.

Question 24: Block Design, which counted toward the PRI on the WAIS-IV, belongs to which index in the five-factor model?

General Ability Index only
Visual Spatial Index (Correct answer)
Processing Speed Index
Fluid Reasoning Index

Correct answer: Visual Spatial Index

Block Design mainly measures visual-spatial analysis and synthesis: breaking a design into parts and rebuilding it. That puts it in the Visual Spatial Index.

Question 25: An examinee scores significantly higher on the Vocabulary and Information subtests compared to the Similarities subtest within the VCI. This particular pattern may suggest a relative strength in which area?

Acquired factual knowledge (Correct answer)
Nonverbal concept formation
Abstract verbal reasoning
Practical social judgment

Correct answer: Acquired factual knowledge

The Vocabulary and Information subtests heavily draw upon an individual's stored fund of general knowledge and word definitions (crystallized intelligence). The Similarities subtest, while also verbal, places a greater demand on abstract verbal reasoning and identifying underlying conceptual links. Therefore, higher scores on Vocabulary and Information relative to Similarities point towards a strength in acquired factual knowledge.

Question 26: In which year was the first version of the WAIS introduced?

1939
1955 (Correct answer)
1990
1905

Correct answer: 1955

The first version of the Wechsler Adult Intelligence Scale (WAIS) was introduced in 1955. It was a significant revision and expansion of Wechsler's earlier test, the Wechsler-Bellevue Intelligence Scale, specifically designed to assess intelligence in adults more effectively with updated norms and subtests.

Question 27: With the transition from the WAIS-IV to the WAIS-5, the core subtests for the Working Memory Index were updated. What are the two core WMI subtests in the WAIS-5?

Arithmetic and Letter-Number Sequencing
Digit Span Sequencing and Running Digits (Correct answer)
Spatial Addition and Symbol Span
Digit Span and Arithmetic

Correct answer: Digit Span Sequencing and Running Digits

The WAIS-5 updated the WMI to broaden its construct coverage. The two new core subtests that compose the primary WMI are Digit Span Sequencing and Running Digits.

Question 28: A 35-year-old client is referred for an evaluation due to lifelong difficulties with organization, sustaining focus during meetings, and completing multi-step projects at work. On the WAIS-IV, you might expect to see a significantly lower score on the Working Memory Index (WMI) compared to their Verbal Comprehension Index (VCI). This pattern is often associated with which condition?

Generalized Anxiety Disorder
Attention-Deficit/Hyperactivity Disorder (ADHD) (Correct answer)
A specific learning disorder in reading
Obsessive-Compulsive Disorder

Correct answer: Attention-Deficit/Hyperactivity Disorder (ADHD)

Adults with ADHD frequently exhibit a cognitive profile on the WAIS-IV characterized by significant weaknesses in working memory and processing speed, while their verbal comprehension abilities may be average or even above average. The described difficulties are hallmark symptoms of ADHD.

Question 29: A 45-year-old client with a master's degree in literature is being assessed. During the WAIS administration, they provide exceptionally detailed and nuanced definitions on the Vocabulary subtest and demonstrate a vast fund of general knowledge on the Information subtest. However, they struggle to explain the relationship between abstract concepts on the Similarities subtest. Which statement is the most likely interpretation of this VCI performance?

The results indicate a significant working memory deficit impacting verbal expression.
The client's high level of education invalidates the VCI results.
The client likely has a weakness in overall verbal ability.
Performance suggests strong crystallized intelligence but a potential relative weakness in abstract verbal reasoning. (Correct answer)

Correct answer: Performance suggests strong crystallized intelligence but a potential relative weakness in abstract verbal reasoning.

This scenario illustrates a common clinical pattern. The client's strong performance on Vocabulary and Information reflects a well-developed fund of acquired knowledge (crystallized intelligence), which is consistent with their educational background. Their difficulty with the Similarities subtest, which requires identifying abstract categorical relationships, points to a specific challenge in abstract verbal reasoning rather than a global verbal deficit.

Question 30: The PRI is considered a measure of which broad cognitive ability in the Cattell-Horn-Carroll (CHC) model?

Crystallized intelligence (Gc)
Processing speed (Gs)
Fluid intelligence (Gf) (Correct answer)
Short-term memory (Gsm)

Correct answer: Fluid intelligence (Gf)

PRI tasks require novel problem-solving with visual stimuli, aligning with fluid intelligence (Gf) in the CHC model.

Question 31: A clinician notes that an examinee's VCI is 108 and WMI is 88. The critical value at p < .05 is 11 points. What is the correct interpretation?

The 20-point discrepancy is statistically significant, but base rate data are needed to judge clinical meaningfulness (Correct answer)
No interpretation is possible without the Processing Speed Index score
The discrepancy is not significant because neither score falls in the impaired range
The discrepancy is clinically significant because both scores differ by more than one standard deviation

Correct answer: The 20-point discrepancy is statistically significant, but base rate data are needed to judge clinical meaningfulness

Because 20 points exceeds the critical value of 11, the difference is statistically significant; the clinician must then consult base rate tables to determine how commonly such a difference occurs in the normative sample.

Question 32: On the WAIS-IV, Picture Completion was moved from a core PRI subtest to supplemental status primarily because:

It required verbal responses unlike the other PRI tasks
It showed lower g-loadings than the three core PRI subtests (Correct answer)
It relied heavily on crystallized knowledge
It was too easy for most adult examinees

Correct answer: It showed lower g-loadings than the three core PRI subtests

Psychometric analyses showed Picture Completion had weaker g-loadings and factor alignment compared to Block Design, Matrix Reasoning, and Visual Puzzles.

Question 33: A psychologist is administering the WAIS and needs to calculate the Verbal Comprehension Index (VCI). Which combination of CORE subtests must be administered?

Similarities, Vocabulary, Information (Correct answer)
Vocabulary, Information, Comprehension
Information, Digit Span, Similarities
Similarities, Arithmetic, Vocabulary

Correct answer: Similarities, Vocabulary, Information

On the WAIS-IV, the core subtests that comprise the Verbal Comprehension Index are Similarities, Vocabulary, and Information. Comprehension is a supplemental subtest for this index.

Question 34: Which of the following cognitive abilities is a primary function measured by the Working Memory Index (WMI)?

Retrieval of long-term factual knowledge
Abstract verbal concept formation
Holding and mentally manipulating information (Correct answer)
Visual-motor coordination and speed

Correct answer: Holding and mentally manipulating information

The WMI is specifically designed to assess an individual's ability to take in information, hold it in immediate awareness, and then perform some mental operation on it. This core function is often described as holding and manipulating information.

Question 35: A clinician finds a 20-point difference between an examinee's Verbal Comprehension Index (VCI) and Processing Speed Index (PSI). To determine if this discrepancy is not just statistically significant but also clinically meaningful, the clinician should consult the WAIS manual to determine the:

standard error of measurement for each index.
reliability coefficient of the Full Scale IQ.
base rate of this difference in the normative sample. (Correct answer)
correlation coefficient between the VCI and PSI.

Correct answer: base rate of this difference in the normative sample.

A statistically significant difference simply means the difference is unlikely due to chance or measurement error. However, its clinical importance is best understood by its frequency in the general population. Base rate tables show how often a specific score difference occurred in the standardization sample. A large difference that is very rare (i.e., has a low base rate) is more likely to be clinically meaningful.

Question 36: An examinee completes the WAIS-IV. Their performance on the Processing Speed Index (PSI) is significantly lower than their scores on the Verbal Comprehension Index (VCI) and Perceptual Reasoning Index (PRI). During the administration of the Coding subtest, the examiner notes the individual has considerable difficulty with graphomotor control, and their pencil grip appears awkward and inefficient. Which statement is the most accurate interpretation?

The discrepancy between the PSI and other indices suggests a lack of effort or motivation on the timed tasks.
The observed fine-motor difficulties may have suppressed the PSI score, suggesting it may not be a pure measure of cognitive speed for this individual. (Correct answer)
The examinee likely has a co-occurring learning disability in reading, which is often linked to low PSI scores.
The low PSI score is likely a valid measure of slow cognitive processing, independent of motor skills.

Correct answer: The observed fine-motor difficulties may have suppressed the PSI score, suggesting it may not be a pure measure of cognitive speed for this individual.

The Processing Speed Index, particularly the Coding subtest, requires rapid and precise visual-motor coordination. Significant difficulties with graphomotor skills can hinder performance, making it unclear if the low score is due to slow cognitive processing, slow motor output, or both. Therefore, the score may be an underestimate of the individual's actual cognitive processing speed.

Question 37: An examiner notes the following WAIS-IV index scores for a client: Verbal Comprehension Index (VCI) = 118, Perceptual Reasoning Index (PRI) = 115, Working Memory Index (WMI) = 88, and Processing Speed Index (PSI) = 85. When interpreting these results, which statement is most accurate?

The profile is consistent and unitary, making the FSIQ the only summary score needed for interpretation.
The client's performance suggests a primary weakness in verbal abstract reasoning.
The General Ability Index (GAI) will be significantly lower than the Full Scale IQ (FSIQ).
The Full Scale IQ (FSIQ) is likely an underestimate of the client's general reasoning ability. (Correct answer)

Correct answer: The Full Scale IQ (FSIQ) is likely an underestimate of the client's general reasoning ability.

The General Ability Index (GAI) is calculated from the VCI and PRI subtests and is less influenced by Working Memory and Processing Speed. In this case, the client's WMI and PSI scores are significantly lower than their VCI and PRI scores. This discrepancy will pull the FSIQ down, making it a potential underestimate of the client's core reasoning and verbal abilities, which are better represented by the GAI.

Question 38: Figure Weights, where the examinee works out which option balances a scale, is classified under which index in the five-factor Wechsler structure?

Fluid Reasoning Index (Correct answer)
Processing Speed Index
Working Memory Index
Visual Spatial Index

Correct answer: Fluid Reasoning Index

Figure Weights measures quantitative and inductive reasoning with new visual material, which is fluid reasoning. It is a core FRI subtest.

Question 39: What is the primary purpose of 'process scores' available in WAIS-IV?

To provide insight into the qualitative nature of errors, not just total correct (Correct answer)
To combine multiple subtests into a single composite
To replace scaled scores when a subtest cannot be administered
To adjust scores for educational attainment

Correct answer: To provide insight into the qualitative nature of errors, not just total correct

Process scores capture how an examinee arrives at answers (e.g., Digit Span Forward vs. Backward), giving clinicians qualitative error analysis beyond total raw scores.

Question 40: The WAIS-IV standardization sample was stratified by which demographic variables?

Geographic region and income only
Age and IQ score only
Sex and native language only
Age, sex, race/ethnicity, and education level (Correct answer)

Correct answer: Age, sex, race/ethnicity, and education level

The WAIS-IV normative sample was stratified by age, sex, race/ethnicity, and education level to mirror U.S. Census proportions.

Question 41: The VCI is considered relatively resistant to neurological insult primarily because:

It relies on crystallized, long-acquired knowledge less affected by acute brain changes (Correct answer)
It measures only fluid reasoning
It is timed and rewards processing speed
It requires no language processing

Correct answer: It relies on crystallized, long-acquired knowledge less affected by acute brain changes

Crystallized abilities tapped by VCI subtests are built over years and tend to be preserved even after brain injury.

Question 42: In the WAIS-IV standardization sample, the average PRI score for adults aged 65–69 compared to adults aged 20–24 typically shows:

An increase, because older adults have more visual experience
A notable decline, reflecting age-related decrements in fluid reasoning (Correct answer)
No change, as perceptual reasoning is highly resistant to aging
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 43: Which of the following best describes the discontinue rule for Matrix Reasoning on the WAIS-IV?

Discontinue after the examinee exceeds the time limit twice
Discontinue after the first perfect-score trial
Discontinue after any 3 incorrect responses
Discontinue after 4 consecutive scores of 0 (Correct answer)

Correct answer: Discontinue after 4 consecutive scores of 0

The standard discontinue rule for Matrix Reasoning is to stop after 4 consecutive items scored 0, indicating the ceiling has been reached.

Question 44: The Digit Span subtest in WAIS-IV includes which three task components?

Serial recall, paired associates, and free recall
Forward, Backward, and Letter-Number
Forward, Backward, and Sequencing (Correct answer)
Forward, Coding, and Symbol Search

Correct answer: Forward, Backward, and Sequencing

WAIS-IV Digit Span includes Digit Span Forward, Digit Span Backward, and Digit Span Sequencing (arranging digits in ascending order), added in this edition.

Question 45: Which of the following is NOT a primary cognitive domain assessed by the Working Memory Index (WMI)?

Attention and concentration
Auditory sequential processing
Visual-spatial reasoning (Correct answer)
Mental manipulation

Correct answer: Visual-spatial reasoning

While some working memory tasks can have a visual component, visual-spatial reasoning as a primary domain is measured by the Visual Spatial Index (on the WAIS-V) or the former Perceptual Reasoning Index (on the WAIS-IV). The WMI primarily focuses on auditory attention, concentration, and mental manipulation.

Question 46: What is the main clinical advantage of reporting separate FRI and VSI scores instead of one combined PRI?

It removes the effect of processing speed on every score
It removes the need for a Full Scale IQ
It shortens administration time
It can separate weak abstract reasoning from weak visual-spatial processing (Correct answer)

Correct answer: It can separate weak abstract reasoning from weak visual-spatial processing

A low PRI could mean weak reasoning, weak visual-spatial processing, or both. Separate FRI and VSI scores let the clinician tell these apart, which matters for diagnosis (for example, right-hemisphere injury versus executive reasoning deficits) and for recommendations.

Question 47: During Visual Puzzles, the examinee is shown a completed puzzle design and then must select:

Two pieces that together form the largest section of the design
The rotation that correctly matches the target orientation
The one piece missing from a partially completed puzzle
Exactly three response pieces from a set of six that together reconstruct the design (Correct answer)

Correct answer: Exactly three response pieces from a set of six that together reconstruct the design

Visual Puzzles presents a target design and six puzzle pieces; the examinee identifies exactly three pieces that, if assembled, would recreate the complete image.

Question 48: On the WAIS Similarities subtest, an examiner asks 'How are a poem and a novel alike?' The best response would be:

Both are exactly the same length
Both are always fiction
Both are read silently
Both use words to express ideas or tell stories (Correct answer)

Correct answer: Both use words to express ideas or tell stories

Similarities responses earn full credit when they identify an abstract, superordinate category shared by both items (e.g., literary forms using language).

Question 49: A psychologist calculates both the Full Scale IQ (FSIQ) and the General Ability Index (GAI) for an individual. The GAI is found to be significantly higher than the FSIQ. This pattern most strongly suggests that the individual's overall cognitive performance is being negatively impacted by relative weaknesses in which domains?

Verbal comprehension and fluid reasoning.
Visual-spatial processing and perceptual organization.
Abstract reasoning and crystallized knowledge.
Cognitive efficiency, specifically working memory and processing speed. (Correct answer)

Correct answer: Cognitive efficiency, specifically working memory and processing speed.

The FSIQ incorporates all four major indices: VCI, PRI, WMI, and PSI. The GAI, however, is derived primarily from the VCI and PRI, with reduced emphasis on the WMI and PSI. Therefore, when the GAI is significantly higher than the FSIQ, it indicates that lower scores on the Working Memory and/or Processing Speed indices are pulling down the comprehensive FSIQ score. These two indices are often collectively referred to as measures of cognitive efficiency.

Question 50: The VCI is considered a strong measure of which type of intelligence, according to the Cattell-Horn-Carroll (CHC) theory?

Crystallized Intelligence (Gc) (Correct answer)
Short-Term Memory (Gsm)
Visual Processing (Gv)
Fluid Intelligence (Gf)

Correct answer: Crystallized Intelligence (Gc)

The Verbal Comprehension Index (VCI) aligns closely with the CHC factor of Crystallized Intelligence (Gc), which involves the breadth and depth of a person's acquired knowledge, the ability to communicate one's knowledge, and the ability to reason using previously learned experiences or procedures.

Question 51: What is the primary purpose of age-corrected scaled scores on the WAIS-IV?

To adjust for educational background differences
To convert raw scores to standard scores across all ages combined
To compare an individual's performance to same-age peers (Correct answer)
To measure gains from practice over multiple administrations

Correct answer: To compare an individual's performance to same-age peers

Age-corrected scaled scores allow comparison of an individual's subtest performance relative to peers in the same age group.

Wechsler Adult Intelligence Scale (WAIS) Exam

The WAIS is the gold-standard individually administered intelligence test, measuring verbal comprehension, perceptual reasoning, working memory, processing speed, and fluid reasoning across multiple subtests.

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