The Complete Guide to the CAT4 Test

When top independent schools, grammar schools, or international academies inform parents that their child will be sitting the CAT4, it often causes immediate confusion. Unlike traditional school exams in English or Mathematics, the Cognitive Abilities Test (CAT4), developed by GL Assessment, does not test what a child has memorised in the classroom. You cannot revise for it by memorising historical dates or timetables.

Instead, the CAT4 measures a child’s underlying academic potential and spatial reasoning capacity. It evaluates how a student thinks, processes information, and solves novel problems when stripped of curriculum bias. Understanding how this test works, how it is scored, and how to prepare for it strategically is essential for any family targeting selective school entry.

What Is the CAT4?

The CAT4 is an online, age-standardised cognitive assessment used widely across the UK and internationally. Schools use it for two primary reasons: as an entrance assessment to select high-ability pupils, and as a baseline diagnostic tool to set academic targets and stream students once admitted.

The exam consists of multiple-choice questions administered under strict timed conditions. It is split into four distinct reasoning areas, known as "batteries." Each battery evaluates a different facet of a student's cognitive architecture.

The Four Assessment Batteries Explained

1. Verbal Reasoning

The Verbal Reasoning battery assesses a child's ability to understand, analyse, and manipulate concepts expressed through words. It measures vocabulary depth, verbal logic, and linguistic fluency.

Verbal Classification: Students are given three words that share a hidden connection or category and must select a fourth word from a list that fits the same rule.
Verbal Analogies: Students must identify the underlying relationship between a pair of words and apply that exact relationship to a third word.

2. Non-Verbal Reasoning

This battery removes language entirely from the equation. It evaluates a child's ability to spot patterns, sequences, and structural rules in geometric shapes and diagrams.

Figure Classification: Students identify geometric shapes that share common visual features, such as symmetry, line count, or shading patterns.
Figure Matrices: Students solve visual grid puzzles by detecting how shapes change horizontally and vertically across a matrix.

3. Quantitative Reasoning

The Quantitative battery evaluates a student's ability to recognise numerical relationships, discover mathematical rules, and apply sequential logic.

Number Analogies: Students determine the mathematical rule by transforming one number into another and applying it to a new number.
Number Series: Students are given a sequence of numbers governed by a pattern and must identify the correct final number in the sequence.

4. Spatial Ability

Spatial ability measures how well a student can visualise, rotate, and manipulate twos and three-dimensional shapes in their mind's eye.

Figure Analysis: Students are shown a piece of paper that has been folded and punched with holes. They must visualise what the paper will look like when unfolded.
Figure Recognition: Students are shown a target shape and must locate that exact shape hidden inside a more complex geometric design.

Understanding Your Child's Score: SAS and Stanines

When results are released, parents receive a report featuring two key metrics: the Standard Age Score (SAS) and the Stanine.

The Standard Age Score (SAS)

The SAS is the primary benchmark used by admissions directors. The raw score is statistically adjusted for the student's exact age in years and months at the time of testing.

100: The national average SAS.
112–117: Above average. Indicates strong potential for standard independent or selective entry.
118–125: High ability. This range is competitive for top-tier independent day and boarding schools.
126–140+: Exceptional ability. Scores in this bracket place a student in the top 3% to 4% nationally.

The Stanine Scale

The Stanine scale condenses the SAS into a simplified 1-to-9 score:

Stanines 1–3: Below national average.
Stanines 4–6: Average cognitive performance.
Stanine 7: Above average (SAS 112–118).
Stanine 8: Well above average (SAS 119–126).
Stanine 9: Top tier performance (SAS 127+).

Top-tier selective schools generally expect candidates to achieve Stanine 7, 8, or 9 across all four batteries.

Navigating CAT4 preparation requires specialised guidance that goes beyond standard school curricula. Email us today at info@exceptionalacademics.com to see how we can help.