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.”

caused participants to devalue their partners’ attractiveness.

adrenal glands are releasing epinephrine and norepinephrine.

Religious involvement is related to greater life expectancy for both men and women.