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Simplify scale figure with accessible colors

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Armin
2026-08-14 12:38:03 +00:00
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validation/CASE_SELECTION.md
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# Scale-example selection and interpretation
The scale examples are selected to make the two released dimensions substantively interpretable. They are illustrative reference cases rather than a representative sample or an independent validation of the posterior coordinates. Published party-history research supports the qualitative interpretation of the cases, not their exact estimated values.
The scale examples are selected to make the two released dimensions substantively interpretable without overloading the display. They are illustrative trajectories rather than a representative sample or an independent validation of the posterior coordinates. Published party-history research supports the qualitative interpretation of the cases, not their exact estimated values.
## Trajectory figure
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All election-year posterior means in these windows form the connected paths. The labelled endpoints include 95% latent-position credible intervals. The manuscript uses published historical research to interpret the broad movements without treating the estimates as causal evidence.
## Two-dimensional landmarks
The standalone anchors cover low, middle and high regions of both scales and include cross-pressured combinations:
- German The Left: 2021 (PartyFacts 1545).
- German Christian Democratic Union: 2021 (PartyFacts 1375).
- Polish Law and Justice: 2019 (PartyFacts 1565).
- UK Conservative Party: 1979 (PartyFacts 1567).
- French National Front: 2022 (PartyFacts 433).
- US Republican Party: 2020 (PartyFacts 809).
Every anchor must match the requested party-year exactly. Horizontal and vertical bars show 95% latent-position credible intervals. The machine-readable plotting table retains every path observation and anchor.
The figure deliberately omits standalone party-year anchors. Colour-blind-safe colours distinguish the three paths, while redundant line types and point shapes preserve legibility in monochrome reproduction. Horizontal and vertical bars show 95% latent-position credible intervals at each labelled endpoint. The machine-readable plotting table retains every path observation.