Feature · Beyond the test
Retest with new questions
Retaking the same questions would measure how well you remember them. The retest uses a parallel form and shows whether the difference exceeds the margin of error.
- parallel form
- accounts for practice
- opens 30 days later
What you see
What the retest does
- 1
New questions, same yardstick
The same areas and the same difficulty, with different questions. Every question in the test has an equivalent in the parallel form.
- 2
Practice taken into account
People who retake a test gain a few points just from already knowing the format. The comparison discounts that effect.
- 3
Change only above the margin
Every test has a margin of error. The comparison says "up", "down" or "stable", and only flags a change when it exceeds the margin.
How it works
How it works
First test
Your result and range are saved in your history.
30 days later
The retest opens 30 days after your first test, after the first subscription renewal. The first 7 days don’t reach it.
The comparison
The two scores side by side, each with its own range, and a conclusion that already accounts for practice.
Details
What to expect
- The most common result is "stable"With the margins of two tests added together, only large changes show up. Most retests come out stable, and the report says so.
- HistoryEach test becomes a point on your progress chart, with its 95% range.
The retest is not proof that your IQ changed. It shows whether the difference between two tests goes beyond what chance and practice would explain.
Questions
Questions about this feature
Why can’t I retake the same questions?
Because you’ve already seen them. The result would measure how well you remember the answers, not your reasoning.
If I train, will my retest go up?
We don’t promise that. Training improves performance on the formats practiced, and the comparison discounts the effect of already knowing the test.
When does the retest open?
30 days after your first test. The member area shows the exact date.
Keep exploring
Other features
-
Beyond the test
Extra tests
Big Five (IPIP-50) and a profile of curiosity, love of learning and critical thinking.
See the feature -
Results
Report
Your estimated IQ with the 95% range, the curve, the 6 areas, a review of every question and one worked question from each area.
See the feature -
Results
PDF
The report in pages, to keep or print, with certificate verification on the last page.
See the feature -
Results
Certificate
With your name, estimated IQ, range and date. Anyone can check it with the code.
See the feature
Welcome
Today's practice: 10 items, about 8 minutes.
Estimated IQ
110
likely range 101 to 119 (95% confidence)
Your certificate
IQNorthCertificate of resultYour name hereEstimated IQ110likely range 101 to 119 (95% confidence)
sample
Today's practice
All gamesYour week
Tests about you
Sample test · 37 questions count
Download PDFReasoning report
Estimated IQ
110
Likely range: 101 to 119 (95% confidence)
What the number means
Your result, 110, falls in the “high average” range. On the theoretical IQ curve (mean 100, standard deviation 15), this score is above about 75% of the population. The most likely value is between 101 and 119.
By area
Correct answers in each type of question. Areas with few questions vary more, so read them as a trend.
- Verbal reasoning4 of 5
- Logic4 of 5
- Number series4 of 5
- Working memory5 of 7
- Matrices7 of 10
- Spatial rotation3 of 5
Certificate
How it will appear on the certificate. After you confirm, you can correct it once within 24 hours.
Apply
IQNorthCertificate of resultYour name hereEstimated IQ110likely range 101 to 119 (95% confidence)
sample
This is an educational reasoning test. The result is an estimate, with a margin of error, not a verdict or a consultation with a psychologist. It does not replace a consultation with a psychologist and must not be used for job or school selection or for any decision about you.
Download Share10 items a day, at the difficulty of your level.
Today's practice
Practice nowSee the last 28 days
Your level
Practice level by area
- Matriceslevel 3
- Number serieslevel 4
- Spatial rotationlevel 2
- Logiclevel 3
- Verbal reasoninglevel 4
- Working memorylevel 3
The training level (1 to 5) shows the difficulty you're practicing. It is not IQ.
Your tests
1st test · sample110 (101–119)
Each dot is one test, with its 95% range. Differences smaller than ~18 points are within chance and the effect of already knowing the format.
Short memory and logic games. Your best score is saved on this device.
Questionnaires about you. They don't measure ability.
They are not a consultation with a psychologist or a verdict.
Describe yourself as you generally are now, not as you wish to be. Think of yourself compared with other people you know who are about the same age. There are no right or wrong answers.
Statement 1 of 50
I am the life of the party.
Doesn't describe me at all Describes me a little Neither yes nor no Describes me well Describes me very wellana@example.com
Preferences
Need help?
Questions about billing, access or the test? The help center has the answers, and you can reach us from there.
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Ready to see how you reason?
Start now. At the end, your estimated IQ with the 95% range stays in your member area.
Start the testTaking the test is free · IQNorth is an educational reasoning test: the result is an estimate, with a margin of error, for personal and educational use.