Signs of a male who is prone to cheating include classic masculine features, such as a wide, angular jaw, a square chin and a prominent brow, a tabloid reported.
The men and women were also asked how attractive they thought they were and whether they had cheated when in a relationship in the past.
They were also asked about poaching – or embarking on an affair with someone who was already in a relationship.
While they might have been single themselves, this sort of behavior could be a sign of “low commitment to monogamous values”, the research team said.
Sixty eight strangers were then shown the head and shoulders shots and asked to rate how likely they were to be unfaithful.
The women were “modestly accurate” at picking out male love-rats. Analysis showed that they weren’t simply drawn to faces they felt were generally not to be trusted. Instead, they were linking masculinity with infidelity.
In contrast, the men were poor at picking out the women who had a history of cheating.