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Intelligence quotient
An intelligence quotient or IQ is a score derived from a set of standardized tests developed to measure a person's cognitive abilities ("intelligence") in relation to their age group. An IQ test does not measure intelligence the way a ruler measures height (absolutely), but rather the way a race measures speed (relatively). Modern IQ tests produce scores for different areas (e.g., language fluency, three-dimensional thinking, etc.), with the summary score calculated from subtest scores. The average score, according to the bell curve, is 100.
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Mind & Brain News
January 5, 2026
Jan. 4, 2026 Researchers compared a traditional Chinese medicine, Yueju Pill, with a standard antidepressant and found both reduced depression symptoms. However, only Yueju Pill increased a brain-supporting protein associated with mood improvement. Brain imaging ...
Jan. 4, 2026 New research shows that AI doesn’t need endless training data to start acting more like a human brain. When researchers redesigned AI systems to better resemble biological brains, some models produced brain-like activity without any training at ...
Jan. 3, 2026 Your daily rhythm may matter more for brain health than previously thought. Older adults with weaker, more disrupted activity patterns were far more likely to develop dementia than those with steady routines. A later daily energy peak was also ...
Jan. 3, 2026 A massive global genetics study is reshaping how we understand mental illness—and why diagnoses so often pile up. By analyzing genetic data from more than six million people, researchers uncovered deep genetic connections across 14 psychiatric ...
Jan. 3, 2026 Researchers discovered that clogged brain “drains” show up early in people at risk of Alzheimer’s disease. These blockages, easily seen on standard MRI scans, are tied to toxic protein buildup linked to memory loss and cognitive decline. In ...
Jan. 1, 2026 A new study suggests the vagus nerve may be one of the heart’s most important defenders against aging. Researchers found that keeping this nerve connected to the heart helps protect heart cells and maintain strong pumping ability. Even partial ...
Jan. 1, 2026 Scientists studying Alzheimer’s in African Americans have uncovered a striking genetic clue that may cut across racial lines. In brain tissue from more than 200 donors, the gene ADAMTS2 was significantly more active in people with Alzheimer’s ...
Dec. 31, 2025 New research reveals a brighter side of ADHD, showing that adults who recognize and use their strengths feel happier, healthier, and less stressed. People with ADHD were more likely to identify traits like creativity, humor, and hyperfocus as ...
Dec. 30, 2025 Cannabis products with higher THC levels may slightly reduce chronic pain, particularly nerve pain, according to a review of multiple clinical trials. The improvement was small and short-lived, while side effects were more common. Products with ...
Dec. 29, 2025 ADHD stimulants appear to work less by sharpening focus and more by waking up the brain. Brain scans revealed that these medications activate reward and alertness systems, helping children stay interested in tasks they would normally avoid. The ...
Dec. 28, 2025 Tiny lab-grown brains are offering an unprecedented look at how schizophrenia and bipolar disorder disrupt neural activity. Researchers found distinct electrical firing patterns that could identify ...
Dec. 28, 2025 Weight loss restored healthy metabolism in both young and mid-aged mice, but the brain told a different story. In mid-aged animals, slimming down actually worsened inflammation in a brain region tied to appetite and energy balance. While this ...
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Jan. 4, 2026 Feeling warm or cold doesn’t just register on the skin—it changes how connected we feel to our own bodies. Research shows that temperature sensations help shape body ownership, emotional ...
Jan. 3, 2026 The brain constantly blends split-second reactions with slower, more thoughtful processing, and new research shows how it pulls this off. Scientists discovered that brain regions operate on different ...
Jan. 2, 2026 Attention depends on the brain’s ability to filter out distractions, but new research suggests this works best when background brain activity is quieter. Scientists found that lowering certain ...
Dec. 29, 2025 Researchers have created a protein that can detect the faint chemical signals neurons receive from other brain cells. By tracking glutamate in real time, scientists can finally see how neurons ...
Dec. 28, 2025 A major new review has put hundreds of alternative autism treatments under the microscope—and most didn’t hold up. Scientists analyzed decades of research and found little reliable evidence that ...
Dec. 26, 2025 Everyday sights and sounds quietly shape the choices people make, often without them realizing it. New research suggests that some individuals become especially influenced by these environmental ...
Dec. 25, 2025 A new study suggests temporal lobe epilepsy may be linked to early aging of certain brain cells. When researchers removed these aging cells in mice, seizures dropped, memory improved, and some ...
Dec. 25, 2025 A new study suggests that dementia may be driven in part by faulty blood flow in the brain. Researchers found that losing a key lipid causes blood vessels to become overactive, disrupting circulation ...
Dec. 24, 2025 Alzheimer’s has long been considered irreversible, but new research challenges that assumption. Scientists discovered that severe drops in the brain’s energy supply help drive the disease—and ...
Dec. 24, 2025 The familiar fight between “mind as software” and “mind as biology” may be a false choice. This work proposes biological computationalism: the idea that brains compute, but not in the ...