Liar, Liar

6. Job

Type and Title Income isn't the sole career point guys falsify; 4 percent of men in the BeautifulPeople.com survey admitted to lying about some aspect of their job, from their title to how many people they supervise. Women weren't far behind at 32 percent, but they were more likely than the men to demote themselves. "Some clever women downplay their intelligence," says Hodge. Ettin sees this with her female clients, but she encourages them to tell the truth. "You want to end up with someone who is in awe of what you do."

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7. Lifestyle 

Other common lies revolve around how online daters spend their money. BeautifulPeople.com's survey found 16 percent of respondents implied they were better off financially than they really were, with 5 percent faking how far and wide they've traveled and another 5 percent bluffing about the type of car they drive. How to spot a liar here? In Dr. Toma's study, these people used fewer "I" statements, so they were more likely to say, "Love to travel" than "I love to travel." It's their way of distancing themselves from their fibs, she explains. Another sign: shorter descriptions. That's because "lying is cognitively taxing," Dr. Toma adds.