Average IQ in Portugal: What PISA 2022 Can—and Cannot—Tell Us

What did Portugal score in PISA 2022?

Portugal performed close to the OECD average in all three PISA domains. The OECD country note reports:

The Portuguese sample included 6,793 students in 224 schools, representing about 96,600 15-year-olds, an estimated 93% of the total population of that age. Each student completed two one-hour subject tests and a background questionnaire. Different students received different combinations of items, which is why PISA means are estimated at the system level rather than treated as individual IQ scores.

Portugal met PISA's quality standards in 2022, so the OECD considered the data fit for reporting. That is a strength of the survey design, not evidence that PISA is an intelligence test. It means the estimate is suitable for describing the performance of the sampled education system on the PISA constructs.

What do proficiency levels show?

Portugal has a similar share of students reaching basic proficiency to the OECD, but fewer top performers in some domains. In mathematics, 70% of students reached at least Level 2, compared with 69% across the OECD, and 7% reached Levels 5 or 6, compared with 9%. In reading, 77% reached Level 2 or higher, compared with 74%, while 5% reached Level 5 or higher, compared with 7%. In science, 78% reached Level 2 or higher, compared with 76%, and 5% reached Levels 5 or 6, compared with 7%.

Level 2 is a PISA performance threshold. It describes the kinds of tasks students can handle on that assessment, such as recognizing a simple mathematical representation or identifying a main idea in a moderately long text. It is not an IQ cutoff, a diagnosis, or a label for an individual child. The distribution gives more context than a single mean, but it remains a description of PISA achievement.

What changed between 2018 and 2022?

Portugal's 2022 results were lower than 2018 in mathematics and reading, while science was about the same. The OECD summarizes the direction of change rather than treating it as a change in national intelligence. Portugal's education ministry reported that the almost 7,000 students who took the mathematics assessment scored about 20 points lower than the 2018 cohort; the OECD country note likewise describes a significant decline in mathematics and reading and no meaningful science change.

The 2022 cycle was delayed by a year because of the COVID-19 pandemic. School closures, attendance, wellbeing, curriculum, learning support, and testing conditions can affect achievement. A lower PISA score is therefore an education-outcome signal that needs context. It cannot show that Portuguese people became less intelligent, and a higher future score would not prove the opposite.

The OECD also notes that the 2018 student-response rate did not meet its standard and that a non-response analysis implied a small upward bias in the 2018 results. Response rates returned to higher levels in 2022. Comparing cycles should therefore use the published uncertainty and methodological notes rather than simple arithmetic alone.

How large are socioeconomic differences?

Socioeconomic status is strongly associated with PISA performance in Portugal. Students in the top quarter of Portugal's national socioeconomic distribution outperformed those in the bottom quarter by 101 mathematics points. Socioeconomic status accounted for 18% of the variation in mathematics performance, compared with 15% on average across OECD countries. About 32% of Portuguese students were in the top international socioeconomic quintile; that group averaged 522 in mathematics.

These relationships describe unequal opportunities and circumstances around learning. They do not imply that a family's resources determine a child's fixed intelligence. Students can also outperform expectations: 9% of disadvantaged Portuguese students reached the top quarter of mathematics performance in their own country, a pattern the OECD describes as academic resilience.

What do gender and immigrant-background results mean?

The PISA pattern differs by subject rather than producing one general ability ranking. In Portugal, boys outperformed girls in mathematics by 11 points, while girls outperformed boys in reading by 21 points. These are subject-specific achievement differences. They are not evidence of a fixed male or female IQ gap, especially when the test content, schooling, language, and learning experiences differ by domain.

The share of students with an immigrant background increased to 11% in 2022, from 7% in 2012. Seven percent of 15-year-olds were first-generation immigrants. The OECD notes that many first-generation students arrived after completing elementary grades elsewhere, which can affect language exposure, curriculum continuity, and familiarity with assessment. Those contextual differences should not be collapsed into a national IQ claim.

Portugal's school experience data also matter. In 2022, 82% of students said they felt they belonged at school, compared with 75% across the OECD. Seventy-five percent reported that mathematics teachers showed interest in every student's learning, versus 63% across the OECD. These are learning-environment indicators, not cognitive scores, but they help explain why achievement is shaped by more than an abstract ability measure.

Related

Average IQ in Europe: How the Continent Compares

The average IQ in Europe is estimated at roughly 97 to 100 on a scale where the global mean is 100, with most countries clustered in the high 90s to low 100s.

Is a PISA score the same as an IQ score?

No. There is no scientifically valid conversion from Portugal's 472 mathematics points or 477 reading points into IQ. PISA evaluates how a sample of 15-year-olds uses learned knowledge in realistic problems. A professional IQ assessment samples constructs such as verbal reasoning, visual-spatial reasoning, working memory, and processing speed, then compares one individual with an age-appropriate norm group.

The scales have different means, units, reliability estimates, and interpretation rules. Rescaling 472 to a 100/15 IQ distribution would produce an invented statistic and falsely imply that school achievement and general intelligence are interchangeable. PISA also excludes people outside the target age and school population, while an IQ referral may concern a child, adult, or specific learning question.

Why do online Portugal IQ estimates disagree?

Online estimates often combine different tests, samples, languages, and years. One website may average timed matrix puzzles completed by self-selected visitors. Another may reproduce an older table based on selected school samples or statistical modelling. Participants with internet access, confidence in the test language, and interest in puzzles are more likely to appear.

Before trusting a national estimate, check the instrument, norm group, age range, recruitment method, year, exclusions, weighting, and uncertainty interval. If those details are missing, treat the number as an informal estimate rather than a measured fact. Even a large volunteer dataset does not become representative simply because it contains many attempts.

How can someone in Portugal get a meaningful IQ result?

Choose an age-appropriate, validated assessment administered under standard conditions by a qualified professional. Ask which Portuguese or other language norms apply, what referral question the assessment answers, and how the evaluator will explain confidence intervals and subtest patterns. School history, language exposure, attention, hearing, vision, health, and educational support should be considered.

An online quiz can be useful practice or entertainment, but it should not be used alone for diagnosis, school placement, employment decisions, or comparisons between nations. A responsible report identifies the test version, administration conditions, norm group, uncertainty, and abilities that were actually measured.

Related

What Is the Average IQ in the World?

Every IQ test is normed so its population averages 100, yet cross-country estimates put the global average human IQ around 82 to 90 — here is why they differ.

Q: What is the average IQ in Portugal?

A: There is no official, current all-age national IQ average for Portugal. PISA 2022 gives achievement scores for sampled 15-year-olds, not one IQ mean for every resident.

Q: What were Portugal's PISA 2022 scores?

A: Portugal averaged 472 in mathematics, 477 in reading, and 484 in science. These are PISA learning scores, not IQ points.

Q: Can I convert Portugal's PISA score into IQ?

A: No. PISA and IQ tests measure different constructs with different samples, norms, and scales. There is no valid conversion formula.

Q: Why did Portugal's PISA scores change after 2018?

A: Mathematics and reading declined, while science was about the same. The pandemic, response conditions, school disruption, and learning context all matter; the change is not evidence of a change in national intelligence.

Q: How can I measure IQ in Portugal?

A: Use a validated, properly normed assessment administered under standard conditions by a qualified professional. Interpretation should include language, age norms, confidence intervals, and the limits of the instrument.

References

• OECD. PISA 2022 Results: Country Note for Portugal.
• OECD Education GPS. Portugal student performance in PISA 2022.
• Government of Portugal. Minister of Education suggests to the OECD a study on the drop in student performance.
• American Psychological Association. IQ definition.

Last updated: July 19, 2026