||Moral psychology is the study of phenomena such as moral thought, feeling, reasoning, and motivation. For example, in moral psychology, one wonders what role reasoning and emotions play in generating moral judgment. Similarly, one asks whether moral motivation has its source in reason or rather sentiments or desire. Other key issues include: the tight connection between moral judgment and motivation, altruism versus egoism, character, and even the evolution of moral capacities.
The topics reveal the partly empirical nature of the field, which makes it of necessity interdisciplinary, even though one can pursue many interesting issue from the armchair. Many of these philosophical problems have ramifications in others areas, especially metaethics. If, for example, moral judgment is grounded in sentiment, then this may support a non-cognitivists theory, which threatens moral realism.