---
title: "Cross-Trajectory Chimera Interventions Reveal Dissociable Roles of Weight Magnitude and Direction in Grokking — Stuff That Spins"
description: "arXiv:2607.06628v1 Announce Type: new Abstract: Which properties of a partially trained network are causally portable to a different, independently trained net…"
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date: "2026-07-09T04:00:00+00:00"
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# Cross-Trajectory Chimera Interventions Reveal Dissociable Roles of Weight Magnitude and Direction in Grokking

**Source:** Unknown  
**Published:** July 9, 2026  
**Original:** https://arxiv.org/abs/2607.06628  

## On this page

- [Overview](#overview)

<a id="overview"></a>

## Overview

arXiv:2607.06628v1 Announce Type: new Abstract: Which properties of a partially trained network are causally portable to a different, independently trained network? Single-trajectory interventions show necessity within one run, not portability across runs. We introduce cross-trajectory chimera interventions: given two runs from different seeds, we split each weight vector into a norm and a unit direction, recombine one run's norm with the other's direction, and continue training. On two modular-

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