Gavin Marshall
AI Psychologist at psychprofile.io
Gavin Marshall is a PhD candidate in Personality Psychology at the University of Groningen, where his research focuses on psychometric validation of personality inventories and the predictive utility of trait-based models in behavioral analytics. His work bridges classical test theory with modern machine-learning approaches to improve the precision of psychological assessment. Deep experience. Intellectual curiosity.
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Recent articles by Gavin Marshall
- Hiring personality test scores: Big Five Inventory (BFI-2) .86 Replace Sum Scores? September 13, 2026
- Conscientiousness predicts job performance: 2026 60-item rho .27 vs .36 September 10, 2026
- Big Five hiring test: 92% vs 71% finish rate on mobile screens September 5, 2026
- Affect-to-Spend Circuit: Why 0.19 vs 0.12 R² Fails to Hold September 4, 2026
- BFI-2 Conscientiousness r=.22: Hiring Cutoff vs Feedback September 2, 2026
- HEXACO Retest Reliability: ICC Limits, Kurtz & Lee, N=500 September 1, 2026
- 16PF Fifth Edition: The 0.75 Reliability Ceiling at 90 Days August 30, 2026
- Big Five Facets vs Domains: The +0.03 AUC Turnover Question August 29, 2026