Kyung Hee Kim at the College of William & Mary discovered this in May, after analyzing almost 300,000 Torrance scores of children and adults. Kim found creativity scores had been steadily rising, just like IQ scores, until 1990. Since then, creativity scores have consistently inched downward. "It's very clear, and the decrease is very significant," Kim says. It is the scores of younger children in America—from kindergarten through sixth grade—for whom the decline is "most serious."
The good news, training can help:
The good news is that creativity training that aligns with the new science works surprisingly well. The University of Oklahoma, the University of Georgia, and Taiwan's National Chengchi University each independently conducted a large-scale analysis of such programs. All three teams of scholars concluded that creativity training can have a strong effect.
There's even better news for science fiction geeks like yours truly:
In middle childhood, kids sometimes create paracosms---fantasies of entire alternative worlds. Kids revisit their paracosms repeatedly, sometimes for months, and even create languages spoken there. This type of play peaks at age 9 or 10, and it's a very strong sign of future creativity.
I have this picture in my head of a stern parent saying, "Nope: no ice cream 'til you watch your Star Trek." :-)