Researchers say they have found a correlation between the ability to keep rhythm and general intelligence. Greater rhythmic accuracy, the ability to tap out a simple, regular rhythm, was associated with higher intelligence in research conducted at Karolinska Institutet and Umeå University in Sweden. From Science Daily:
"'It's interesting as the task didn't involve any kind of problem solving,'" says Fredrik Ullén at Karolinska Institutet, who led the study with Guy Madison at Umeå University. "'Irregularity of timing probably arises at a more fundamental biological level owing to a kind of noise in brain activity'...
"According to Fredrik Ullén, the results suggest that the rhythmic accuracy in brain activity observable when the person just maintains a steady beat is also important to the problem-solving capacity that is measured with intelligence tests.
"''We know that accuracy at millisecond level in neuronal activity is critical to information processing and learning processes,'" he [Fredrik Ullén] says.
They also demonstrated a correlation between high intelligence, a good ability to keep time, and a high volume of white matter in the parts of the brain's frontal lobes involved in problem solving, planning and managing time.
"'All in all, this suggests that a factor of what we call intelligence has a biological basis in the number of nerve fibres in the prefrontal lobe and the stability of neuronal activity that this provides,'" says Fredrik Ullén.
Fredrik Ullén, Lea Forsman, Örjan Blom, Anke Karabanov and Guy Madison, The Journal of Neuroscience, 16 April 2008.