What is a norm table and what is it for
A norm table is the reference table that converts a test's raw score into a relative position, comparing it against a reference group.
A norm table (baremo) is the reference table that converts a test’s raw score into a relative position, comparing it against a reference group. It’s what turns a loose number—“got 28 out of 40”—into something interpretable: “above most people who take this test.” Without a norm table, a raw score is just a data point; with one, it’s a signal you can read.
The problem it solves
Imagine a candidate gets 28 points on a test. Is that good? Impossible to know on its own: it depends on how hard the test is and how everyone else does. The norm table answers exactly that. It takes the raw score and places it within the distribution of a reference group, so you can say whether it’s high, average, or low compared to someone.
The detail most often overlooked: the reference group
Here’s the part worth looking at carefully. The same score means different things depending on who it’s compared with:
| Reference group | What landing “in the middle” means |
|---|---|
| General population | Average relative to anyone |
| Applicants for a specific role | Average among those competing for that position |
| Specialists in the field | Average among experts (a far more demanding yardstick) |
That’s why a serious norm table states which population it was built against. If it doesn’t, interpreting the result becomes an act of faith. And because populations change, norm tables can become outdated and need to be recalculated against the relevant stratum.
Its relationship with the percentile
The norm table and the percentile are often mentioned together, but they’re not the same: the norm table is the reference table; the percentile is one of the ways that table expresses position (what percentage of the group fell below). The percentile is the result of applying the norm table.
Learn to read an assessment report from start to finish.
How to read a reportIn summary
A norm table is the table that converts a raw score into a relative position against a reference group, giving meaning to a number that has none on its own. What’s decisive is who it compares against: the reference group completely changes the reading, so a good norm table states it and updates when the population changes. It’s related to the percentile, but it’s not the same thing. At Kokoro, these concepts underpin how the test results in the library are presented; to see them in context, check out how to read a report.