shared goals that override differences among people and require their cooperation.”

entails harm or risk of harm to one’s self or to others.

reappraise the situation by considering how much it matters.

They are free-riding on the efforts of the other members of the group.”

increase blood flow to the amygdala.

decreased participants’ willingness to become sexually active.

Coping with stress fosters stronger immune functioning.

People are consciously capable of choosing

Men fantasize about sex more often than women.

think carefully about other tasks her roommate has failed to do.”