Are humans getting smarter or dumber?
What measures our intelligence? Genetics? Technology? Reaction time? Scientists differ, and it skews the perceptions of our intelligence.
Being able to understand and use emotions in an effective manner is a crucial attribute one needs for great leadership.
Are humans becoming less intelligent?
Some scientists argue that humans have just diversified them with various types of intelligence.
Smoking weed during teenage years can lower intelligence
Teens who smoke marijuana see their IQs drop as adults, and deficits persist even after quitting, according to a new study.
Research from Washington University in St. Louis has identified variations in brain scans that they believe identify portions of the brain that are responsible for intelligence.
As suspected (and as explained by cartoons) brain size does play a small role; they said that brain size accounts for 6.7 percent of variance in intelligence. Recent research has placed the brain’s prefrontal cortex, a region just behind the forehead, as providing for 5 percent of the variation in intelligence between people.
Specific genes linked to brain size, intelligence
Though scientists have suggested bigger brains are “smarter,” this study is the strongest case yet for a genetic connection to brain size and to IQ. Of course, brain size is not 100 percent correlated with a person’s intelligence, and other factors, including connections between brain cells and even a person’s experiences, play roles.
A pill to make you smarter? Drug grows brain cells
The drug helps more baby brain cells survive and grow to become functioning brain cells.