Section 1 — What you will learn
✓ By the end you will understand
- Precision: Door ke “YES” kitne sahi the (Wrong catches kam).
- Recall: Door ne real Good apples me se kitne pakde (Miss kam).
- False Positive: Bad apple ko Good samajh ke pakad liya.
- False Negative: Good apple chhoot gaya.
- Trade-off: Threshold change → Precision/Recall idhar-udhar.
Section 2 — Controls
Challenge adds score + win: Precision & Recall both good.
Rule: if score ≥ threshold → Door says YES (opens).
Example: 20% Good, 80% Bad.
High skill makes the game easier.
This only changes animation speed and count per time.
How to play: Start → items move. Change Threshold slider. Watch TP/FP/FN/TN counters and meters.
Section 3 — Live stats
Precision
—
Recall
—
False Positives
0
False Negatives
0
True Positives
0
True Negatives
0
Section 4 — Math (simple)
What the Magic Door is computing
Live formulas (kid mode)
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🧠 Kid Coach
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Tip: change threshold and watch FP vs FN.
Section 5 — The Magic Door Arena
Good apple (positive)
Bad apple (negative)
Door says YES (caught)
Door says NO (rejected)
score (0→1)
Live explanation
Press Start. Low threshold = catches many (high Recall) but may catch wrong (low Precision).
Game HUD (no useless text)
Explore: move the Threshold slider and watch how FP/FN changes.
Precision Meter
Recall Meter
Trade-off Alarm (FP vs FN)
If FP explodes → threshold too low. If FN explodes → threshold too high.
Quick actions