If you’ve received a score of 130, 140, or 150 on an IQ test — or if you’re simply curious about what these numbers represent — you’ve likely found that the internet offers more mythology than explanation. These scores place individuals well above average, but what that means practically, statistically, …
How Your Diet During Pregnancy Affects Your Baby’s Brain Development
The nine months of pregnancy represent the most rapid and consequential period of brain development in human life. By birth, a baby’s brain contains roughly 100 billion neurons, nearly all of which were produced during gestation. The nutritional environment during this window has lasting effects on the architecture, connectivity, and …
Do IQ Tests Measure What They Claim? Common Criticisms Answered
IQ tests are among the most scrutinized instruments in all of psychology. Critics argue they are culturally biased, too narrow to capture real intelligence, and used to justify inequality. Defenders argue they are the most rigorously validated psychological measures in existence. Both camps have valid points — and understanding where …
WAIS-IV vs. WAIS-V: What Changed and Why It Matters for Your IQ Score
The Wechsler Adult Intelligence Scale is the most widely used IQ test in the world. When Pearson released the WAIS-V in 2024 — the first major revision since the WAIS-IV appeared in 2008 — it introduced significant structural changes that affect how cognitive ability is measured, scored, and interpreted. Whether …
Growth Mindset: Does It Actually Work? What the Meta-Analyses Show
Few ideas in educational psychology have achieved the cultural penetration of Carol Dweck’s growth mindset theory. The concept — that believing intelligence is malleable rather than fixed leads to greater academic achievement — has been adopted by school districts, corporate training programs, and parenting guides worldwide. But as the idea …
Fluid vs. Crystallized Intelligence: What They Are and Why Both Matter
Intelligence is not a single ability. One of the most important distinctions in cognitive science — and one that affects everything from how IQ tests are designed to how cognition changes with age — is the difference between fluid and crystallized intelligence. Understanding this distinction is essential for interpreting test …
IQ vs. EQ: Which Matters More for Success in Life?
The debate between IQ and EQ — cognitive intelligence versus emotional intelligence — has become one of the most popular topics in popular psychology. Daniel Goleman’s 1995 bestseller claimed that EQ “can matter more than IQ,” and this idea has since permeated corporate training, education, and self-help. But what does …
The Flynn Effect: Are Humans Getting Smarter — or Dumber?
In 1984, political scientist James Flynn published a finding that would reshape how we think about intelligence: IQ scores had been rising steadily across the developed world for as long as records existed. The gains averaged roughly 3 points per decade — meaning the average person today would score in …
COVID Brain Fog: What Research Says About Long-Term Cognitive Effects
Three years after the initial pandemic wave, “brain fog” remains one of the most commonly reported long COVID symptoms. Patients describe difficulty concentrating, word-finding problems, slowed thinking, and memory lapses — complaints that are vague enough to be dismissed but consistent enough to demand scientific attention. Research has now moved …
Does Breastfeeding Make Kids Smarter? A Critical Look at the Evidence
The claim that breastfeeding boosts intelligence is one of the most frequently cited benefits of nursing. Parenting guides, health organizations, and pediatricians routinely include “higher IQ” among the advantages of breast milk. But how strong is the evidence, and how much of the observed association reflects the milk itself versus …