8.5 Build an Error Log That Teaches

Error review is where practice compounds

Timed practice produces data, but only review turns that data into improvement. If you write only "missed question 12," you have little to train. If you write "missed negative marker at end," you have a clear next drill.

A DLAB study error log should be simple. Use columns for date, drill type, error category, short cause, and next action. Keep the entries brief enough that you will actually maintain them after a timed set.

Useful categories include sound discrimination, stress, word order, role marker, number marker, tense or time marker, negation, visual mapping, working-memory loss, pacing, and overfitting. These categories match the skills that public-source preparation can responsibly train without inventing protected content.

Practice-style example entry:

The next action should be small. Do not write "study harder." Write "do 10 suffix contrast items" or "run 15-minute mixed set with order check." Specific actions are easier to complete and easier to measure.

Separate accuracy misses from pacing misses. If you solved the item correctly after two extra minutes, the issue may be speed or working memory. If you still missed it untimed, the issue is rule extraction. Those problems need different practice.

Also separate careless errors from unknown patterns. A careless error means you knew the rule but failed to apply it. The fix is a checklist or slower final scan. An unknown pattern means you did not infer the rule. The fix is contrast-pair practice.

Do not store claimed real DLAB items in an error log. Protected-test ethics matter. Use original practice-style prompts, your own mistake labels, and general skill categories. The purpose is to improve reasoning, not to collect restricted content.

Review frequency matters. A large error log that is never revisited becomes clutter. At the start of each session, pick one recurring error category and warm up with it. At the end of the session, add only the misses that teach something.

Look for patterns across days. If most misses are marker omissions, your final check needs work. If most misses are overfitting, you are inventing rules too early. If most misses occur late in the set, endurance and reset habits need attention.

Tie the log to the public facts. The DLAB is an aptitude test used in language-training selection contexts, and DLIFLC course categories can involve long training periods such as 36, 48, or 64 weeks depending on category. Preparation should therefore build durable reasoning habits. An error log helps by making each miss a small lesson rather than a discouraging score.