7 min readmethodology
How IQ Scores Are Calculated
An IQ score is a rank, not a grade. How raw answers become scaled and composite scores, why deviation replaced the old quotient, and how the bell curve and re-norming set the number.
Blog — #iq
Original research, methodology deep-dives, and comparison guides for personality assessments.
- 7 min readmethodology
How to Interpret Your IQ Results
The headline number does the least useful work. Read the index profile, uneven strengths, and percentile rarity—then turn the report into study, work, and learning strategy.
- 6 min readframeworks
Fluid vs. Crystallized Intelligence
The two engines behind your IQ: raw in-the-moment reasoning (Gf) and accumulated knowledge (Gc), how they diverge with age, feed each other, and which one you can actually train.
- 7 min readresearch
Can You Increase Your IQ?
What the evidence supports: heritability vs. neuroplasticity, what raises cognitive performance (learning, exercise, schooling) and why brain-game gains rarely transfer—plus the Flynn effect.
- 6 min readresearch
Average IQ by Age
Why your score is always compared to your peers. Age-norming explained, the lifespan trajectory of fluid vs. crystallized ability, and why midlife often trades speed for depth.
- 7 min readframeworks
The g Factor Explained: The One Thing Every Cognitive Test Has in Common
The most replicated finding in psychology. Spearman's g, the positive manifold, neural efficiency, factor analysis, and why your Full Scale IQ is essentially an estimate of g.
- 6 min readframeworks
Emotional Intelligence (EQ) vs Cognitive Intelligence
EQ vs IQ decoded: overlaps, myths, trait vs ability measures, trainable empathy & regulation habits—and where emotion skills strengthen reasoning clarity.
- 6 min readframeworks
What IQ Tests Actually Measure
What IQ scores sample: general ability (g), core subtests, prediction limits, fairness & Flynn nuances, misconceptions, constructive interpretation—not rank.
- 9 min readcomparisons
EQ vs IQ: Which Predicts Career Success?
IQ versus EQ careers: overlaps in training/teaming versus edges in burnout repair, mentorship, ambiguity—plus myths about dominance and deterministic success.
- 10 min readcomparisons
Paid vs Free IQ Tests Online
Free IQ quizzes versus paid normed batteries—norm transparency, scams, fairness, adaptive design, remote limits, plus when licensed testing is warranted.
- 10 min readmethodology
Can You Prepare for an IQ Test?
Prepare for IQ-style tests ethically: sleep, pacing, sanctioned practice, novelty limits, refuse leaked items, calibrate expectations—skip guru hype and cheats.