Studiu. IQ-ul este în declin. Ce bănuiesc oamenii de știință, după ce au analizat 730.000 de persoane • Newsweek România

A study involving nearly 730,000 Norwegians reveals a decline in IQ scores since 1975, contradicting previous trends of increase. Researchers suggest environmental factors, not genetics, may be responsible for this change. The study indicates a drop of about seven points per generation, challenging older theories about lower IQ individuals having more children. An American study presents a mixed picture, showing a decrease in verbal reasoning but an increase in spatial skills. Overall, researchers emphasize that intelligence may not be decreasing, but rather shifting due to environmental influences.