Here’s an interesting article in the Scientific American by Adina Roskies and Walter Sinnott-Armstrong:
Cognitive science and moral philosophy might seem like strange bedfellows, but in the past decade they have become partners. In a recent issue of Cognition, the Harvard University psychologist Joshua Greene and colleagues extend this trend. Their experiment utilizes conventional behavioral methods, but it was designed to test a hypothesis stemming from previous fMRI investigations into the neural bases of moral judgments (see here and here).
In their study Greene et al. give subjects difficult moral dilemmas in which one alternative leads to better consequences (such as more lives saved) but also violates an intuitive moral restriction (it requires a person to directly or intentionally cause harm to someone else). For example, in the “crying baby” dilemma subjects must judge whether it is wrong to smother their own baby in order to save a large group of people that includes the baby. In this scenario, which was also used by the television show M.A.S.H., enemy soldiers will hear the baby cry unless it is smothered. Sixty percent of people choose to smother the baby in order to save more lives. A judgment that it is appropriate to save the most lives, even if it requires you to suffocate a child, is labeled “utilitarian” by Greene et al., whereas a judgment that it is not appropriate is called “deontological.” These names pay homage to traditional moral philosophies.
The rest is here.