Applications and conceptual developments made in social identity research since the mid-1990s are summarized under eight general headings: self and identity types, prototype-based differentiation, influence through leadership, motivations of leadership. social identity, intergroup emotions, intergroup conflict and social harmony, Social psychology is the scientific study of how people's thoughts, feelings, beliefs, intentions and goals are constructed in a social context through interactions real or imaginary with others. It therefore examines human behavior influenced by others and the conditions under which social behavior and feelings are manifested.