Energy-efficient brains

Successful problem solving depends on a brain that efficiently lessens its workload rather than laboring harder, a new study finds. Individuals may thus prefer less effortful problem-solving strategies not only for their simplicity but for their superior results, contend neuroscientist Erik D. Reichle of Carnegie Mellon University in Pittsburgh and his colleagues.

Reichle’s group administered tests of visual-spatial ability and verbal ability to five men and seven women.