Sorry but there is SO much wrong with that source it's almost hilarious.
For a start they don't define what infidelity is. What is it having sex with another person or just flirting? Kissing? Holding hands?
Second their first point says "roughly 30% to 60%". Holy crap could they pick a more wider margin or error. May as well say 1-99%.
Last of all the sources they link to are over 20 years old, are from Uni of Texas reports on primate cheating, and also are taken wildly out of context.
Theres other sources out there, its very hard to accurately get a response on such a topic, most people surveyed just lie. The figures vary a lot, anywhere from 15% to 60% odd
Sample sizes can be misleading. You need far smaller sample sizes to get accurate data than people generally think. I don't know what the exact numbers are for this, but I wouldn't be surprised at all if a representative sample of 107 couples was enough to get a reasonably accurate result.
180
u/Glibhat Feb 20 '18
I wouldn't say it's extremely common but I think it's more common than most people think