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Cross Country Study

All articles tagged with #cross country study

science2 months ago•16 min saved

Global Flynn Effect Reversal: IQ Declines Across Developed Nations

Cross-country data from Norway, Denmark, Finland, France, Britain, Australia and others show average IQ scores have declined since the mid-1990s by about five to seven points per generation, reversing the Flynn Effect. The reversal appears environmental rather than genetic, with potential contributors including schooling changes, screen time, nutrition, and social factors; U.S. results show declines in verbal and matrix reasoning but a rise in three-dimensional spatial rotation, suggesting a redistribution of cognitive skills rather than a simple drop in intelligence. The exact causes remain debated.

via Space Daily|

#cognitive-science #cross-country-study #environmental-factors

science3 months ago•2 min saved

Urban Birds Startle More at Women Than Men, Study Finds

An international study of 37 urban bird species across five European countries found birds let male researchers approach about three feet closer before fleeing than female researchers, a robust sex-based difference in flight initiation distance across cities and species. Researchers ruled out obvious factors like hair length, body size, and height, and suggested possibilities such as subtle appearance cues or odor, but no definitive explanation yet. The finding is consistent but remains puzzling to scientists.

via Nautilus | Science|

#birds #cross-country-study #flight-initiation-distance