Find the topic you keep getting wrong

The average is the wrong number

Most people look at a score, see a percentage, and move on. A percentage is an average, and an average of uneven parts tells you very little. Ninety percent across a whole reviewer can mean you know nine topics well and one badly, or that you know all of them equally and are near the top everywhere. Those need completely different amounts of work.

The same applies across reviewers. A healthy average across eight reviewers can be hiding one subject where you score below chance because you have never properly learned it.

Read the misses, not the score

Hachi keeps a full record of what you chose on every question, not just whether it was right. Review Answers shows your answer next to the correct one with the explanation attached, and it stays available after the session ends.

• Group the misses by topic rather than by reviewer. Questions carry the topic they came from, so the same weakness usually shows up in more than one reviewer.
• Look at the shape of the error. Missing every question on one narrow topic is a gap in the material. Getting one option wrong across a whole topic is usually a wording problem.
• Count the repeats. A question you have missed on three separate attempts is not bad luck and is not a schedule problem.

Distinguish not-known from not-understood

These look identical in a score and need opposite treatment.

Not known means the information was never in front of you, or it was there once and did not survive. The fix is retrieval: quiz the topic until it sticks.

Not understood means the information is there and you keep choosing the wrong option anyway. That is usually a sign you are pattern-matching on the shape of the question rather than reading it. The fix is slower: read the explanation for those questions slowly and restate the rule in your own words until the distractor stops being tempting.

One useful diagnostic: if you would have picked differently had you read the question twice, it is a reading problem rather than a knowledge gap, and a smaller question set on that topic will fix it faster than a larger one.

Fixing the weak topic

Build a reviewer for the weak topic alone rather than re-taking the big one. Generation makes this easy: give the generator your notes for that one section, ask for a focused question count, and you have a short, targeted reviewer in a couple of minutes.

Then take it until you are consistently correct, and go back to the original reviewer a week later to check the fix held. A weak topic that has been repaired is one of the few changes in revision that reliably moves an overall score.