Colonial Lagos Newspapers: 4-Category Emotional Analysis (Editorial & Correspondence by Newspaper)
š¬ Validation Information
Method: Cohen's weighted kappa coefficients with quadratic weighting
Dataset: Lagos Observer editorials (n=50)
Source: Sawada & Sasaki (2025). "Quantitative Analysis of Negativity in Colonial Nigerian Newspapers." DH 2025, Lisbon.
Reliability by Emotion:
- High (Īŗ > 0.7): Disgust (0.843), Anger (0.819), Joy (0.747), Trust (0.705)
- Moderate (Īŗ ā 0.4): Surprise (0.441), Anticipation (0.419)
- Low (Īŗ ā 0.3): Sadness (0.321), Fear (0.300)
š® Future Development
Current validation limited to Lagos Observer subset. Future improvements planned:
- Expanded validation with Lagos Weekly Record
- Larger sample sizes for comprehensive statistical analysis
- Additional visualization options and statistical measures
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