CAT4 Results Explained: Why the Scores Do Not Tell the Whole Story
Receiving your child’s CAT4 results can feel both helpful and strangely inconclusive.
You may be given a series of scores, percentiles, stanines and descriptions, yet still be left wondering:
Is this a strong result?
Why are some scores much higher than others?
Do the results match what we see at home and school?
Should my child be achieving more?
Does the profile suggest that something is being overlooked?
What should we do next?
CAT4 can provide valuable insight into a child’s reasoning strengths. However, the report cannot, by itself, explain why a particular pattern has emerged or what that pattern means for the individual child. That requires a much wider view.
What does CAT4 assess?
The Cognitive Abilities Test, commonly known as CAT4, is used by many schools to assess four areas of reasoning:
Verbal reasoning, which involves thinking with words and relationships between ideas
Quantitative reasoning, which involves recognising and applying numerical relationships
Non-verbal reasoning, which involves solving problems using shapes and patterns
Spatial ability, which involves mentally generating and transforming visual information
Unlike an English or mathematics attainment test, CAT4 is not primarily testing what a child has been taught within the curriculum. It is designed to provide schools with a broader view of how a child reasons and where they may have relative strengths or areas of challenge. GL Assessment’s information for parents explains the four batteries in more detail.
The score parents most commonly notice is the Standard Age Score, or SAS. This adjusts for the child’s exact age and compares their performance with a nationally representative sample of children of the same age. The national average is 100. Reports may also contain percentile ranks, stanines and confidence bands. GL Assessment provides a concise guide to these different measures. These figures provide useful context, but understanding the numbers is only the beginning.
Why the overall score may not be the most important result
Parents are often drawn immediately to their child’s mean or overall CAT4 score.
However, an average can conceal considerable variation. Two children might have the same overall mean, but one may have four broadly similar scores while the other has a striking strength in spatial and quantitative reasoning alongside a much lower verbal score. Those are not necessarily equivalent educational profiles.
GL Assessment advises schools to look beyond the mean and consider the pattern across all four batteries. Its published examples show that an overall result can sometimes underestimate or obscure particular strengths.
The profile might raise useful questions about how a child understands information, approaches unfamiliar tasks or demonstrates what they know. Yet it is important not to jump directly from a score pattern to a firm conclusion.
CAT4 may show that a difference exists. It does not automatically explain why.
When CAT4 and school attainment do not match
One of the most common sources of confusion is a child whose CAT4 results appear stronger than their everyday attainment.
A parent may see high reasoning scores but relatively ordinary results in English, mathematics or reading. Alternatively, a child may perform very well in taught curriculum work without having an especially striking CAT4 profile. This is not necessarily contradictory.
Reasoning assessments and attainment assessments measure different things. CAT4 explores reasoning abilities that support learning, while attainment tests examine knowledge and skills that a child has already acquired. GL describes abilities assessments as more forward-looking, whereas attainment assessments reflect current curriculum performance. The relationship between the two can therefore be very informative.
Where reasoning appears considerably stronger than attainment, it may suggest that the child is not currently demonstrating everything they are capable of. But the CAT4 report will not establish the reason. The explanation could involve the child’s educational history, core knowledge, reading, written output, accuracy, confidence, motivation or another aspect of their learning profile. Determining which factors are genuinely relevant requires further evidence, not assumption. Similarly, a high CAT4 score does not guarantee exceptional school performance. Children still need secure knowledge, effective teaching, appropriate challenge and the ability to apply their understanding consistently.
An uneven profile does not provide a diagnosis
A pronounced difference between the four CAT4 batteries can naturally lead parents to wonder whether it indicates dyslexia, dyscalculia, ADHD or another specific learning difficulty. CAT4 cannot diagnose any of these conditions. An uneven profile may raise a question that deserves closer consideration, but similar patterns can have different explanations for different children. A lower verbal score, for example, might need to be considered alongside reading, vocabulary, language history and classroom performance.
This is particularly important for children who use English as an additional language. Their non-verbal and spatial results may reveal strengths that are less visible in language-dependent tasks, while the verbal score needs to be interpreted within the context of their exposure to English and previous education. GL provides specific guidance on interpreting CAT4 for pupils with English as an additional language. CAT4 may help identify where further questions should be asked. It does not supply the diagnosis or explanation.
CAT4 is not a permanent measure of a child’s future
A CAT4 profile should not be treated as a fixed ceiling on what a child can achieve. The assessment provides evidence about developed reasoning abilities demonstrated at a particular stage. GL’s guidance encourages schools to use results to inform teaching, support and challenge, rather than allowing a lower score to restrict expectations. Equally, a very high score should not create the expectation that every aspect of learning will be effortless.
A child may have significant reasoning strengths while still needing help with organisation, accuracy, confidence or essential academic foundations. Another may need more demanding opportunities before their strengths become visible through everyday school attainment.
The results are most useful when they lead to better questions and more appropriate opportunities, rather than labels.
What CAT4 cannot tell you on its own
CAT4 cannot independently determine:
why a child may be underperforming
whether a specific learning difficulty is present
how motivated or confident the child feels
whether a particular school is the right fit
what form of support will be most effective
whether the child will gain entry to a selective school or win a scholarship
how their profile will develop over time
It also does not capture every quality that matters to a child’s education. Creativity, curiosity, practical ability, determination, communication and personal interests may all contribute significantly to how and where a child flourishes.
This is why CAT4 should be considered alongside attainment information, school reports, teacher observations, parental insight and the child’s wider educational history. GL itself presents CAT4 as part of a broader, more rounded understanding of a child rather than a complete answer in isolation.
When might the results deserve closer examination?
Further interpretation may be particularly helpful when:
the four battery scores are noticeably uneven
the overall mean seems inconsistent with individual strengths
CAT4 results and school attainment do not appear to align
the profile differs from what parents or teachers expected
a child seems capable but is not making the anticipated progress
important strengths do not appear to be recognised at school
the family is unsure whether further specialist assessment would be useful
the results may influence decisions about support, school choice or selective entry
None of these situations automatically means that something is wrong. They do suggest that the numbers should be considered in context rather than accepted or dismissed at face value.
Why individual interpretation matters
The standard report can explain what the scores represent. It cannot know the individual child. It does not know whether the child has changed schools, experienced disrupted learning, speaks several languages, produces excellent verbal ideas but struggles to record them, has lost confidence in a particular subject or shows strengths that conventional classroom tasks rarely reveal. Nor can it bring together several years of reports, assessments and parental observations to determine whether a pattern is consistent and meaningful.
That is the distinction between reading the report and understanding the child.
How a Progress & Potential Review can help
The Progress & Potential Review brings together existing CAT4, CEM or other assessment information with school reports, attainment data, parental insight and selected educational diagnostics where appropriate.
The purpose is not simply to repeat the descriptions already provided in the CAT4 report. It is to consider how the evidence fits together and explore the questions that matter for the individual child, including:
whether their attainment reflects their wider strengths
whether particular differences merit further investigation
what support or additional challenge may be appropriate
which questions would be useful to discuss with school
whether specialist assessment should be considered
how the findings may inform future educational decisions
Families receive a personalised written review and consultation, with clear recommendations about the most appropriate next steps. A CAT4 report gives you a set of valuable scores. The more important question is:
“What do those scores mean for your child?”
Frequently asked questions
What is the average CAT4 score?
The average Standard Age Score is 100. However, the individual verbal, quantitative, non-verbal and spatial scores may provide more useful information than the overall mean alone.
Can CAT4 diagnose dyslexia?
No. CAT4 may reveal a pattern that raises further questions, but it cannot diagnose dyslexia or another specific learning difficulty. Further literacy or specialist assessment may sometimes be appropriate.
Why might CAT4 results differ from school results?
CAT4 explores reasoning abilities, while most school assessments measure curriculum knowledge and skills. Differences can arise for many reasons and need to be interpreted alongside the child’s wider educational evidence.