Secular IQ Trajectory (1900–2026+)
Turning Point: ~1995
● Fluid IQ
● Crystallized IQ
-- Matrix Reasoning
-- Vocabulary
-- Spatial Ability
SCRUB YEAR:
2025
Fluid IQ
96.0
-4.0 vs 1995
Crystallized IQ
99.0
-1.0 vs 1995
20th-C. Peak Gain
+27.0 pts
1900–1995
Reversal Rate
-1.3 pts
per decade
Counterfactual Hypothesis Levers
65%
0 yrs
80%
0 pts
Hypothesis Insight: Digital media saturation shifts cognitive engagement away from abstract matrix reasoning towards rapid information processing, contributing significantly to fluid intelligence drops in modern post-1995 cohorts.
Population IQ Bell Curve (2025 vs 1995 Baseline)
Baseline Mean: 100.0
Scrubbed Mean: 96.0
Std Dev (σ): 15.0