Item analysis

Question statistics

Attempts · 6Questions with data · 5

Question	n	Difficulty p	Discrimination r_pb	Verdict
How does deformable attention in Deformable DETR reduce computational complexity compared to standard self-attention?	6	0.33	0.79	OK
What enables DETR to avoid using non-maximum suppression (NMS) for duplicate removal?	6	0.33	0.79	OK
Why is bipartite matching necessary when training an object detector that outputs a fixed number of prediction slots?	6	0.50	0.80	OK
Why is Generalized IoU (GIoU) preferred over standard IoU for bounding box regression during training?	6	0.67	0.69	OK
Why is the Vision Transformer (ViT) forced to use relatively large patches for high-resolution images?	6	0.83	0.49	OK

Rejection rule (from 5 attempts): a question is flagged when its difficulty p falls outside 0.30–0.85 (share answering correctly) or its point-biserial discrimination drops below 0.15 (correlation with the rest of the attempt score). Retiring and regenerating flagged questions runs offline: uv run python -m app.quality … --regenerate.