# Preprint reports improved robot learning on rare obstacle-pushing tasks

_Published Wednesday, November 4, 2026 at 10:05 PM EST · Robotics, Science · Latest · Tier 2 — Notable_

Researchers report in a preprint that a method for selecting past training experiences raised rare-task success from 0.49 to 0.69 on a three-joint arm pushing an object around an obstacle, against a labeled-oracle ceiling of 0.74.

The method gives unusual experiences more weight during training. When rare situations depend on behavior relative to a goal, it scores short sequences rather than individual transitions. The researchers deliberately omit the importance-weight correction used in prioritized replay because full correction cancels the method's effect, making training match uniform sampling.

## Sources

- [arXiv Query: search_query=cat:cs.RO&id_list=&start=0&max_results=30](https://arxiv.org/abs/2611.05929v1)

---
Canonical: https://techandbusiness.org/newswire/-t8rMf74zf-Q0gb-kz1Vei
Published: 2026-11-05T03:05:55.331Z
Story chronology: 2026-11-04T04:18:33.000Z
Retrieved: 2026-11-05T05:44:22.812Z
Publisher: Tech & Business (techandbusiness.org)