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3,585 results for: assessments
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Science & SocietyMain result of Facebook emotion study: less trust in Facebook
Facebook’s controversial manipulation of emotional posts raises key questions about how to study online behavior.
By Bruce Bower -
AnimalsHow to count a sea turtle
Trends, not absolute numbers, matter more when it comes to conservation efforts for sea turtles.
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CosmologyMaybe time’s arrow needs ergodicity as well as entropy
Explaining the arrow of time might require an equilibrium universe with hidden ergodic dynamics.
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MathDoctors flunk quiz on screening-test math
Many doctors, and the news media, don’t understand that because of the statistics of screening tests, a test with 90 percent accuracy can give a wrong diagnosis more than 90 percent of the time.
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EarthComing Storms: Method predicts intensity of U.S. hurricane seasons
A new computer model that analyzes summer-wind patterns can help predict whether the United States will suffer a damaging hurricane season.
By Sid Perkins -
ChemistryThe Proper Popper: Corn kernel’s chemistry is key to its ka-pop
The secret to better popcorn popping is the crystalline structure of the kernel's hull.
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EarthMind the Gap: Inadequate monitoring at many U.S. volcanoes
A report just released by the U.S. Geological Survey ranks the threats posed by the nation's volcanoes.
By Sid Perkins -
Health & MedicineWaking up that lazy eye
Wearing an eye patch can improve vision in children with amblyopia, or lazy eye, up to age 17.
By Nathan Seppa -
EarthPortrait of destruction
A new simulation suggests where the most damaging ground motions would occur if a magnitude 7.7 earthquake struck the San Andreas fault east of Los Angeles.
By Sid Perkins -
AnthropologyFounding Families: New World was settled by small tribe
A new genetic analysis indicates that only about 200 to 300 people crossed the ice age land bridge from Asia to become the founding population of North America.
By Bruce Bower -
Disorderly Conduct: U.S. survey finds high rates of mental illness
Nearly half of all adults in the United States develop at least one mental disorder at some time in their lives, although most cases aren't serious enough to require treatment.
By Bruce Bower -
EarthIcy Heat: Satellites look at heat flow through Antarctica’s crust
Using satellite observations of Earth's magnetic field, scientists can estimate the amount of heat flowing upward through Earth's surface under kilometers-thick ice.
By Sid Perkins