The Stanford-Binet Intelligence Scales, 5th Edition (SB5) is one of the world's most respected IQ tests, with over 100 years of development history. Administered by a licensed psychologist, it measures five cognitive factors across both verbal and nonverbal domains, producing a Full Scale IQ (FSIQ), Abbreviated Battery IQ (ABIQ), and five Factor Index Scores. Especially useful for identifying highly and profoundly gifted individuals.
Five cognitive factors, each measured through both verbal and nonverbal subtests — 10 subtests total. Each factor contributes equally to the Full Scale IQ (FSIQ).
Crystallized intelligence — accumulated information and word knowledge.
Factor 3
Quantitative Reasoning
20%
of FSIQ
Verbal: Verbal Quantitative Reasoning~10%
Nonverbal: Nonverbal Quantitative Reasoning~10%
Mathematical thinking, not memorized procedures.
Factor 4
Visual-Spatial Processing
20%
of FSIQ
Verbal: Position and Direction~10%
Nonverbal: Form Board / Form Patterns~10%
Spatial perception, manipulation of visual forms.
Factor 5
Working Memory
20%
of FSIQ
Verbal: Memory for Sentences / Last Word~10%
Nonverbal: Block Span / Delayed Response~10%
Short-term memory, attention, and cognitive control.
Full Content Outline
SB5 Subtest Breakdown
All 10 subtests with verbal and nonverbal versions of each factor. The SB5 is individually administered — preparation focuses on cognitive development, not drilling specific answers.
Fluid ReasoningFactor 1 · 20%
Verbal: Early Reasoning & Verbal Absurdities
Early Reasoning: pictures or objects arranged in logical sequences — identify the missing element. Verbal Absurdities: "What is silly or wrong about this?" examiner reads a sentence with a logical error.
›Measures deductive reasoning and logical thinking
›Requires verbal articulation of a logical error
›Practice: play "what's wrong with this?" games daily
Nonverbal: Object Series & Matrices
Object Series: predict the next object in a visual sequence. Matrices: 2×2 or 3×3 grids — identify the missing cell using row and column patterns.
›Measures inductive reasoning with visual stimuli
›No language required — pure pattern identification
KnowledgeFactor 2 · 20%
Verbal: Vocabulary & Verbal Knowledge
Vocabulary: define words of increasing difficulty. Verbal Knowledge: general information questions covering science, history, geography, and culture.
›Measures crystallized intelligence (Gc)
›Prep: broad reading across subjects, curiosity-driven exploration
Nonverbal: Picture Absurdities
A picture with something wrong or illogical. Point to or explain what doesn't make sense. Tests common knowledge and visual reasoning without requiring verbal responses.
Quantitative ReasoningFactor 3 · 20%
Verbal & Nonverbal Quantitative Reasoning
Verbal: word problems involving mathematical reasoning, counting, and quantity concepts. Nonverbal: visual quantity problems, counting objects, comparing amounts without computation.
›Tests mathematical thinking, not memorized facts
›Prep: math conversations, reasoning puzzles, estimation activities
Visual-Spatial ProcessingFactor 4 · 20%
Verbal: Position and Direction
The examiner describes spatial relationships verbally ("the circle is above and to the right of the square"). Child points to the matching picture. Tests the ability to translate verbal spatial descriptions into mental images.
Nonverbal: Form Board & Form Patterns
Form Board: place puzzle pieces into a board to match a target shape (tangram-style). Form Patterns: reproduce a target design using colored plastic chips. Tests direct spatial manipulation.
›Prep: origami, tangrams, LEGO construction, block building
Working MemoryFactor 5 · 20%
Verbal: Memory for Sentences & Last Word
Memory for Sentences: repeat sentences back verbatim. Last Word: remember and recall the last word of several sentences. Tests verbal short-term memory and recall.
Nonverbal: Block Span & Delayed Response
Block Span: the examiner taps a sequence of blocks; child replicates the sequence. Delayed Response: remember which cup an object was hidden under after a delay. Tests visual-spatial short-term memory.
›Prep: memory games, sequence tasks, Simon-style games
Prep Timeline
5-Week Stanford-Binet V Study Schedule
One factor per week. The SB5 is individually administered by a licensed psychologist — preparation focuses on general cognitive development, not test-specific drilling.
Note: The SB5 is administered individually by a licensed psychologist. You cannot "practice" the specific subtests. The best preparation is broad cognitive enrichment — reading widely, playing reasoning games, and building curiosity across all domains.
The SB5 produces five types of scores. The FSIQ is the most reported; the extended IQ scale is why psychologists prefer SB5 for profoundly gifted assessment.
Full Scale IQ (FSIQ)
Mean 100, SD 15. Combines all five factors, both verbal and nonverbal. 130+ = Highly Gifted (98th pct); 145+ = Exceptionally Gifted (99.9th pct).
120–129
Superior
130–144
Highly Gifted
145+
Exceptionally Gifted
Abbreviated Battery IQ (ABIQ)
A quicker 2-subtest screening version (15–20 min). Correlates well with FSIQ but is less precise. Often used as a first-pass screen before a full evaluation.
15–20 min
Abbreviated screening version
Extended IQ Scale
The SB5 uniquely measures intelligence above IQ 160. The extended scale reaches 225+, capturing abilities that cause ceiling effects on other tests. This makes SB5 the preferred test for profoundly gifted assessment.
Study Materials
Recommended Stanford-Binet V Books
Handpicked guides for parents navigating IQ testing. Affiliate links — we earn a small commission at no extra cost to you.
Assessing Gifted Children: A Practical Guide for Parents
Explains IQ tests including SB5 for parents — what they measure, how to interpret scores, and what to do with results.
The Stanford-Binet Intelligence Scales, 5th Edition (SB5) is one of the world's oldest and most respected individually administered IQ tests. It measures five cognitive factors (Fluid Reasoning, Knowledge, Quantitative Reasoning, Visual-Spatial Processing, and Working Memory) across verbal and nonverbal domains, producing a Full Scale IQ (FSIQ).
How is it different from the WISC-V?
Both are individually administered IQ tests for children. Key differences: the SB5 tests ages 2–85+ (WISC-V is 6–16); the SB5 has an extended IQ scale reaching 225+ (better for profoundly gifted); the WISC-V has five indices and is more commonly used for school-based evaluations. Psychologists choose based on the child's age and the referral question.
What score is "highly gifted"?
On the SB5, FSIQ 130+ (98th pct) is Highly Gifted. FSIQ 145+ (99.9th pct) is Exceptionally Gifted. FSIQ 160+ is Profoundly Gifted — a range where the SB5's extended scale provides more reliable measurement than other IQ tests.
Can the SB5 measure extremely high IQ?
Yes — this is the SB5's most important differentiator. Most IQ tests have a ceiling of ~155–160. The SB5's extended IQ scale can reliably measure scores up to 225+, which is why it is the preferred instrument for profoundly gifted assessment and talent searches at the highest ability levels.
Who administers the SB5?
The SB5 must be administered individually by a licensed psychologist or trained school psychologist. It cannot be taken as a group test or online. The evaluation is typically 45–75 minutes and produces a written psychological report with all scores and recommendations.