The situation of having a mate and having that mate have sex with someone else.
This situation occurred often over time and constitutes infidelity.
Evolutionary Problem: threatens the mate’s chance for reproductive success/ sperm competition.
Cues: observing a sexual act, flirtation and then even associated elements, once you suspect your mate is cheating you think you may have been lied too, that your mate may have had sex with someone else, etc..
The emotion that evolved from this: Sexual Jealousy
Sexual Jealousy- prepares you for things such as violence, sperm competition, withdrawal of investment, murdering the rival emerges
Many emotions produce characteristic displays that broadcast to others the emotional state of the individual.
Many emotional expressions appear to be designed to be informative and these have been so reliably informative that humans also evolved automated interpreters of facial displays of emotions that decode these public displays into knowledge of others mental states.
SO WE KNOW HOW TO INTERPRET EACH OTHER’S MENTAL STATE!
1. Provides observers with information about the state of that individual’s mental programs and physiology
2. Identify the evolutionarily recurrent situation being faced
Some emotions are signaled w/expressions and some or not, WHY?
There was a net benefit or cost to having others know that mental state, so they averaged out.
For the situations that occurred often, it was beneficial to know one’s face. Example: fear was probably beneficial to signal because it signaled the presence of danger, danger that might effect one’s kin or friends.
When selection is neutral, signs of an emotion should only be a byproducts of whatever is necessary to run the emotion.
When selection disfavors others knowing how we feel, selection should suppress & obscure external cures identifying internal states.
SELECTION PRESSURES RESULTED IN: some emotions would be automatically broadcast, other’s would not evolve a signal and others would evolve circuits that regulate whether or not you want to show emotions, such as with language.