London, May 2 (IANS) Researchers have discovered that you can tell whether someone is really listening or not by how frequently they blink.
Closing their eyes too often is a sign that their thoughts is elsewhere, a study has found.
"What we suggest is that when you start to mind-wander, you start to gate the information even at the sensory endings - you basically close your eyelid so there's less information coming into the brain," said Daniel Smilek, a cognitive neuroscientist from the University of Waterloo in Ontario, Canada.
Smilek, who led the study, said that the research was part of a shift in how scientists are thinking now starting to think about the human mind, reports telegraph.co.uk.
"The mind doesn't ignore the world all by itself; the eyelids help," he said.