Scientists have revealed that flashing a stranger a coy smile or even just making eye contact can have a huge impact on their feelings, the Daily Mail reported.
Researchers have conducted tests on hundreds of students to find out how tiny gestures can affect people -- and found how even the smallest amount of eye contact made them feel connected to others.
"Ostracism[被孤立] is painful," said chief researcher Eric Wesselmann, a social psychologist at Purdue University.
The team hopes the results can help explain why people often feel lonely in large cities where people rarely make eye contact.
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