U of M News Service
“Women are more likely to rely on enumeration,” said Brown, a visiting research scientist at the University of Michigan Institute for Social Research. “They tend to say, ‘I just know,’ and if you ask them to explain how they know, they say, ‘Well, there was John, Tom, etc.’ This is a strategy that typically leads to underestimation.
“Men are twice as likely to use rough approximation to answer the question. And rough approximation is a strategy known to produce over-estimation.”