BrainTypeIQ is an online IQ test based on CHC theory that uses nine tasks to measure overall IQ and five cognitive domains. Overall IQ combines performance across the nine tasks to show the general level, while the five domains show relative strengths and areas that require more effort, which can differ between people with the same overall IQ.
BrainTypeIQ measures overall IQ and five domains
| Domain | Abbreviation | Ability measured |
|---|---|---|
| Verbal comprehension | Gc | Use word knowledge for understanding and explanation |
| Fluid reasoning | Gf | Find the rule in an unfamiliar problem and derive an answer |
| Visuospatial processing | Gv | Understand shapes and spatial relationships and manipulate them mentally |
| Working memory | Gwm | Hold information temporarily while working with it |
| Processing speed | Gs | Distinguish simple information quickly and accurately |
All nine tasks, overall IQ, and the brain type report are free. The detailed report includes the five domain scores, nine task scores, GAI, and CPI.
Nine tasks form overall IQ and the five domains
BrainTypeIQ combines different task formats covering vocabulary, figure reasoning, visuospatial processing, memory, and processing speed. Overall IQ uses all nine tasks, while each of the five domains is calculated from the tasks assigned to it.
The nine-task and five-domain measurement design explains what each task measures. How BrainTypeIQ scores are calculated explains how the task scores are combined.
Comparison norms and measurement precision from 841 Japanese-version participants
For the Japanese version, 841 eligible first-time completers were used to build the comparison norms that convert raw performance to the IQ scale. The same 841 participants were used to analyze the measurement precision of overall IQ.
| Analysis | Result |
|---|---|
| Model-based reliability of overall IQ | .929 |
| Standard error of measurement for overall IQ | About 4.0 points |
Reliability of .929 indicates the precision obtained when the nine tasks are combined into overall IQ. An SEM of about 4.0 points means that one observed score should be read as an estimate spanning several points rather than as a value fixed to a single point.
BrainTypeIQ Japanese-version norming explains how the comparison basis was built, and BrainTypeIQ reliability and measurement error provides the reliability analysis. The English version currently uses provisional scoring while it builds its own dataset.
Use the results for self-understanding and practical changes
Overall IQ shows the general level of cognitive ability. Looking at the five domains as well shows why people with the same overall IQ can differ: one may perform particularly well when thinking through language, another when working with figures, while another may find tasks more demanding when information must remain in mind throughout several steps.
The result can be used not only to judge whether scores are high or low, but also to translate a cognitive profile into everyday conditions. Stronger visuospatial processing might suggest organizing information through diagrams and layout. Demands on working memory can be reduced by putting the steps into notes. When speeded work requires more effort, reserving time for checking in advance can improve the workflow.
BrainTypeIQ brain type classification organizes combinations of the nine cognitive task scores into nine main types and 27 profiles. It is not a separate personality test. How to read the report explains the scores in more detail.
Take BrainTypeIQ to complete all nine tasks and see your results.
If you need evidence for a diagnosis, formal accommodations, a professional opinion, or another external submission, choose an assessment administered by a qualified professional through an appropriate health or psychological service.