Full context:   Piaget studied the cognitive development of children by analyzing them during their games and through interviews, establishing (among other principles) that the children's moral maturation process occurred in two phases, the first of heteronomy and the second of autonomy: The American psychologist Lawrence Kohlberg (1927–1987) continues the studies of Piaget. His studies collected information from different latitudes to eliminate the cultural variability, and focused on the moral reasoning, and not so much in the behavior or its consequences. Through interviews with adolescent and teenage boys, who were to try and solve "moral dilemmas", Kohlberg went on to further develop the stages of moral development. The answers they provided could be one of two things. Either they choose to obey a given law, authority figure or rule of some sort or they chose to take actions that would serve a human need but in turn break this given rule or command.