# Motion Semantic Drift Analysis Report

**Windows analyzed:** 2016, 2017, 2018, 2019, 2022, 2023, 2024, 2025, 2026
**Top N motions per axis:** 20

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## Summary

- **Stable axes:** None
- **Axes with inflection points:** 0
- **Parties with cross-ideological voting:** 0

## Axis Stability

**Stable axes (similarity > 0.7):** None
**Reordered axes:** [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
**Unstable axes:** []

## Semantic Drift

No drift data available (no stable axes or insufficient data).

## Party Voting Analysis

No cross-ideological voting detected.

## Methodology

- **Axis stability:** Jaccard similarity of top-N motion rankings per component across windows
- **Semantic drift:** Cosine distance between fused embedding centroids of top-N motions per axis
- **Inflection points:** Drift rate exceeding 2× median drift rate
- **Cross-ideological voting:** Parties voting 'voor' on motions where canonical opposite-wing parties have high loadings