From LibreTexts, under CC BY-NC-SA 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.
9.5: Glossary
Opening the book…
conventional moral development: stages 3 and 4 of moral development where morality is internalized, and the concern is on society norms
pre-conventional moral development: first 2 stages of moral development where morality comes from outside the person, and the concern is on physical consequences of actions
post-conventional moral development: stages 5 and 6 of moral development where morality comes from personal understanding of rights and justice, regardless of whether that understanding matches societal norms