Is the Flynn Effect waning? There's some mixed evidence. But as usual, Flynn himself has some interesting thoughts:

Although Flynn cautions against generalizing the recent Danish and Norwegian experiences, he anticipates similar results will crop up elsewhere in the world. But he's not glum about it. Flynn is convinced that the cause of his eponymous effect has to do with changes in the environment that allow children more opportunity to exercise the kinds of skills probed in today's intelligence tests—changes like a shift to smaller family sizes, which allow parents more time to interact with each child, for example, or devotion of an ever-greater portion of kids' leisure time to abstract, mentally demanding games. He points out that in industrialized, middle-class countries (like those of Scandinavia), such influences must be reaching a point of saturation: "You can't really get the family much smaller than one or two kids." And the current craze for Sudoku puzzles not withstanding, as Flynn says, "eventually, people do want to relax."

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