Pluralism by Design: Testing Duty-to-Diversify Mechanisms in Agent-Based Simulation
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2025
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| author | Lok, C.Y. Lawrence |
| author_facet | Lok, C.Y. Lawrence |
| contents | <p>Exposure diversity is a core civic safeguard against algorithmic monoculture. We test a minimal implementation of the Duty-to-Diversify (D4) principle proposed in the Constitutional Architecture of Hybrid Societies (CAHS). Using an agent-based model of personalised news delivery (600 agents, 40 epochs, seed 42), we compare a baseline engagement-only recommender with a treatment system that adds a Variety Dial and Counterpoint Adjacency rule: when the Imbalance Index (II) exceeds 0.22, a counter-stance article is injected to maintain a diversity floor (VI ≥0.45). Results across 400 runs show that the diversified regime sustains exposure diversity (VI ≈0.49 vs 0.08; +485%), improves comprehension (+28%), and reduces echo ratio (–22%) and imbalance (–25%) while slightly lowering click-through rate (–17%) and leaving churn unchanged. The findings support CAHS Thesis 8 (Pluralism requires design and hope) and demonstrate that exposure-diversity mechanisms can measurably enhance comprehension without destabilising participation.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17393696 |
| institution | Zenodo |
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| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Pluralism by Design: Testing Duty-to-Diversify Mechanisms in Agent-Based Simulation Lok, C.Y. Lawrence <p>Exposure diversity is a core civic safeguard against algorithmic monoculture. We test a minimal implementation of the Duty-to-Diversify (D4) principle proposed in the Constitutional Architecture of Hybrid Societies (CAHS). Using an agent-based model of personalised news delivery (600 agents, 40 epochs, seed 42), we compare a baseline engagement-only recommender with a treatment system that adds a Variety Dial and Counterpoint Adjacency rule: when the Imbalance Index (II) exceeds 0.22, a counter-stance article is injected to maintain a diversity floor (VI ≥0.45). Results across 400 runs show that the diversified regime sustains exposure diversity (VI ≈0.49 vs 0.08; +485%), improves comprehension (+28%), and reduces echo ratio (–22%) and imbalance (–25%) while slightly lowering click-through rate (–17%) and leaving churn unchanged. The findings support CAHS Thesis 8 (Pluralism requires design and hope) and demonstrate that exposure-diversity mechanisms can measurably enhance comprehension without destabilising participation.</p> |
| title | Pluralism by Design: Testing Duty-to-Diversify Mechanisms in Agent-Based Simulation |
| url | https://doi.org/10.5281/zenodo.17393696 |