Meditation helps focus better, study shows. In the process people are able to distinguish even minute differences.
The research was inspired by work on Buddhist monks, who spend years training in meditation. You wonder if the mental skills, the calmness, the peace that they express, if those things are a result of their very intensive training or if they were just very special people to begin with, says Katherine MacLean, who worked on the study as a graduate student at the University of California Davis. Her co-advisor, Clifford Saron, did some research with monks decades ago and wanted to study meditation by putting volunteers through intensive training and seeing how it changes their mental abilities.
About 140 people applied to participate; they heard about it via word of mouth and advertisements in Buddhist-themed magazines. Sixty were selected for the study. A group of thirty people went on a meditation retreat while the second group waited their turn; that meant the second group served as a control for the first group. All of the participants had been on at least three five-to-ten day meditation retreats before, so they werent new to the practice. They studied meditation for three months at a retreat in Colorado with B. Alan Wallace, one of the studys co-authors and a meditation teacher and Buddhist scholar.
The people took part in several experiments; results from one are published in
Psychological Science, a journal of the Association for Psychological Science. At three points during the retreat, each participant took a test on a computer to measure how well they could make fine visual distinctions and sustain visual attention. They watched a screen intently as lines flashed on it; most were of the same length, but every now and then a shorter one would appear, and the volunteer had to click the mouse in response.