Alison Chung of Chicago is not wired like most people. This can present challenges socially, but from a business perspective it's her competitive advantage as the owner of a consulting firm that is essentially a digital detective agency.

As a child in Hong Kong, Ms. Chung obsessed over mathematical puzzles, detective novels and committing people's license plates to memory. While studying at Wellesley College in the 1970s, her favorite pastime was taking the bus to the Massachusetts Institute of Technology for three-dimensional tic-tac-toe tournaments. "Whilst other people were going on dates, I could not wait for the week to end, so that I could get into the competitive games," she said.