Twenty rapid questions. Positive and negative formulations are mixed unpredictably. A level unlocks after a score of 19/20 or better.
After each question you will see only Right or Wrong. No answer key or explanation is revealed.
Progression
Seven levels
Practice any unlocked level. Passing your highest unlocked level opens the next.
Recent sessions
Accuracy trend
95% progression line
Polarity
What is costing marks?
This compares the semantic task: selecting a supported option versus selecting the unsupported / exception option. It is intended to expose the inversion error we are training.
Session complete
Level complete
History
Progress over time
Scores, response time and the supported/unsupported polarity gap are calculated from this browser's stored sessions.
Trend
Last 30 sessions
Task type
Polarity accuracy
Levels
Level history
Best session score and cumulative accuracy.
Sessions
Recent history
Local data
Backup and portability
The site has no account or server database. Progress is stored locally, with JSON backup for moving browsers or domains.
Export progress
Download the current unlock state and session history. The export records performance metadata but does not contain answer keys.
Import progress
Merge a backup into this browser. Existing sessions are retained and the highest unlocked level wins. Exports from the earlier standalone drill are also accepted.
Reset this browser
This clears all saved sessions and returns the drill to Level 1. Export first if you might want the history later.
What is stored?
Completed session date, level, score, response times, question family, the wording used for the instruction, and whether the task semantically asked for a supported or unsupported option. The browser does not store the correct option.