Over the past 100 years,population IQ scores have
A)remained about the same.
B)decreased about 3 points per decade.
C)increased about 3 points per decade.
D)doubled.

Question

Over the past 100 years,population IQ scores have 
A)remained about the same. 
B)decreased about 3 points per decade. 
C)increased about 3 points per decade. 
D)doubled.

Quizplus · Accepted Answer

Research shows that population IQ scores have been increasing at a rate of about 3 points per decade over the past 100 years, a phenomenon known as the Flynn effect. This increase is believed to be due to improvements in nutrition, education, and the environment.

Over the Past 100 Years,population IQ Scores Have