Final answer:
A person is mostly concerned with external rewards and personal consequences of an action during the preconventional stage of moral development, where young children focus on the outcomes of their actions as they relate to themselves.
Step-by-step explanation:
In what stage of personal moral development is a person mostly concerned with external rewards and personal consequences of an action? According to Lawrence Kohlberg's theory of moral development, this occurs during the preconventional level. This level is characterized by the individual's focus on direct consequences to themselves, such as external rewards and personal consequences, rather than a deeper understanding of the societal rules or the abstract principles that define morality.
The preconventional stage typically includes young children who view the world solely through their senses and have not yet developed the cognitive ability to understand moral reasoning beyond their immediate experience. It is during this stage that behavior is largely guided by the outcomes of actions, especially those directly affecting the individual. This is in contrast to later stages, such as conventional and postconventional, where individuals consider societal norms or abstract ethical principles when making moral judgments.