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 …
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 …
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 …
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 …
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 …
A quick search for “IQ test” returns dozens of websites promising to measure your intelligence in 10 minutes. Meanwhile, a professional cognitive assessment takes 2–3 hours, costs hundreds of dollars, and requires a trained psychologist. Are the free online versions worth anything, or are they little more than entertainment? The …
As cannabis legalization spreads across the United States and globally, a question with significant public health implications has moved from academic journals to everyday conversation: does cannabis use make you less intelligent? The answer emerging from two decades of research is more nuanced than either side of the legalization debate …
Few topics provoke more parental anxiety than screen time. As smartphones, tablets, and streaming services become embedded in children’s daily lives, a persistent worry has taken hold: is all this screen exposure damaging their cognitive development? The research paints a more nuanced picture than either the alarmists or the dismissives …
Psychometrics, a specialized branch within psychology, is dedicated to the theory and methodology of psychological measurement. This discipline encompasses the development and refinement of testing instruments, measurement techniques, and assessment procedures aimed at quantifying latent psychological constructs—attributes not directly observable but inferable through systematic analysis. Such constructs include intelligence, personality …
The SAT is the most widely taken standardized test in the United States, completed by over two million students annually. IQ tests are the most established instruments for measuring cognitive ability. Given their shared reliance on reasoning, problem-solving, and processing speed, a natural question arises: does your SAT score reflect …
