Study: Those Who Cheat Are 3.5 Times More Likely To Do It Again

Life & Love | Gerren Keith Gaynor | 08/18/2014 | 04:00 PM EDT

As they say: 'once a cheater, always a cheater'

The old adage “once a cheater, always a cheater” could not be more accurate, according to a new study that found that those who cheat are more likely to do it again.

University of Denver psychology graduate student Kayla Knopp studied 484 unmarried adults aged 18 to 35 to find out if people who step out on their significant other in one relationship are more likely to do so in the next.


Knopp and other researchers asked participants questions such as, "Have you had sexual relations with someone other than your partner since you began seriously dating?" and "Has your partner had sexual relations with someone other than you since you seriously began dating?"

The conclusion: those who admitted to infidelity were three and half times more likely to cheat in their next relationship.

"This means that of those people who said they had sex with someone else in their first relationship, about 45 percent said they also had outside sexual contact with someone in their next relationship," Knopp told The Huffington Post.

"We can't say for sure what this means," she added, "But I think it indicates that how people are feeling about trust, fidelity, and commitment in their relationships is even more salient than what their partners are actually doing."

The study also found that patterns of infidelity also spill over into those of identify themselves as non-cheaters; participants who had unfaithful partners in their last relationship were three times more likely to be cheated on again. And people who suspected their partners of cheating were 10 times as likely to be suspicious in their next relationships.

As revealing the study it is, it only tells part of the story.


The study does have it's limitations, however. As Knopp explained to The Huffington Post, she and her team specifically asked participants about "sexual contact" with someone other than their partner, which doesn't include non-sexual infidelity such as emotional affairs, online relationships, sexting, or even behaviors like kissing. The sample also didn't include people in same-sex relationships.

Still, there's a lot to be learned; while the study doesn't reveal why people cheat, it can help those who have been through it plan for the future.

"Our advice would be to talk with your partner about your relationship histories. If one or both of you has had trouble staying faithful in the past, what happened then? Might it happen again? How can you and your partner anticipate those difficulties together, and tackle them as a team?" Knopp advised.


"Many people expect monogamy and fidelity to just happen easily, but we know that isn't true. Commitment takes effort and communication, and being able to confront the possibility that you or your partner might struggle to maintain fidelity can make you better able to handle those challenges in the future."

(Photo: Kevin RL Hanson/DK Stock/Corbis)

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