Study: ADHD is overdiagnosed and overtreated

Like autism, ADHD lies on a spectrum, and some children should not be treated.

Photo: NDABCREATIVITY / Adobe Stock
  • ADHD is an extremely contentious disorder in terms of diagnosis and treatment.
  • A research team examined 334 studies on ADHD published between 1979 and 2020.
  • The team concluded that ADHD is being overdiagnosed and overtreated in children with milder symptoms.
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    30 grunts and sounds that may have been the first language

    Linguists discover 30 sounds that may have allowed communication before words existed.

    Credit: Alexander Krivitskiy / mana5280/ Unsplash /Big Think
    • What did the first person who wanted to speak say?
    • New research suggests that there are lots of sounds that everyone understands.
    • These sounds may have allowed the first exchanges that gave birth to language.
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    Physicists push limits of Heisenberg Uncertainty Principle

    New studies stretch the boundaries of physics, achieving quantum entanglement in larger systems.

    Entangled drumheads.

    Credit: Aalto University.
    • New experiments with vibrating drums push the boundaries of quantum mechanics.
    • Two teams of physicists create quantum entanglement in larger systems.
    • Critics question whether the study gets around the famous Heisenberg uncertainty principle.
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    Mixing human + animal DNA and the future of gene editing

    "The question is which are okay, which are not okay."

    • As the material that makes all living things what/who we are, DNA is the key to understanding and changing the world. British geneticist Bryan Sykes and Francis Collins (director of the Human Genome Project) explain how, through gene editing, scientists can better treat illnesses, eradicate diseases, and revolutionize personalized medicine.
    • But existing and developing gene editing technologies are not without controversies. A major point of debate deals with the idea that gene editing is overstepping natural and ethical boundaries. Just because they can, does that mean that scientists should be edit DNA?
    • Harvard professor Glenn Cohen introduces another subcategory of gene experiments: mixing human and animal DNA. "The question is which are okay, which are not okay, why can we generate some principles," Cohen says of human-animal chimeras and arguments concerning improving human life versus morality.

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    'Ghost forests' visible from space spread along the coast as sea levels rise

    Seawater is raising salt levels in coastal woodlands along the entire Atlantic Coastal Plain, from Maine to Florida.

    Photo by Anqi Lu on Unsplash
    Surprising Science
    Trekking out to my research sites near North Carolina's Alligator River National Wildlife Refuge, I slog through knee-deep water on a section of trail that is completely submerged.
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    How to fool a shark using magnets

    A simple trick allowed marine biologists to prove a long-held suspicion.

    Credit: D Ross Robertson/Wikimedia/Big Think
    Surprising Science
    • It's long been suspected that sharks navigate the oceans using Earth's magnetic field.
    • Sharks are, however, difficult to experiment with.
    • Using magnetism, marine biologists figured out a clever way to fool sharks into thinking they're somewhere that they're not.
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