If they had, they might have found not that less attractive people were more deceptive, but that older people were more deceptive.
If they deceive in their profiles it is probably not because they evaluate themselves as being less attractive, and feel the need to compensate for that fact, but because they accurately assess that they need to do that in order to attract the attention of men who prefer to spend their time chatting online with women who could be their daughters.
One point about this study: the participants ranged in age from 18 to 53, and yet the judges ranged in age from 18 to 22.
I cannot be the only one who thinks that a 20 year-old judging the attractiveness of a 50 year-old online dater is going to necessarily give a lower attractiveness score than might a judge who is closer to the participant’s age.
Finally they were photographed in three poses, one of which replicated their main profile picture.