Final answer:
Chris is using Erikson's psychosocial theory, a stage theory, for understanding Mr. Moats' development, which is an example of a mid-range theory.
Step-by-step explanation:
Chris reviews Erikson's Stages of Growth and Development to determine which stage Mr. Moats is in.
This is an example of psychosocial theory, which is a stage theory of development proposed by psychologist Erik Erikson. Psychosocial theory emphasizes the social nature of our development rather than its sexual nature, which was a key point in Freud's theory.
In this context, Chris is applying a mid-range theory, which focuses on specific aspects of human behavior and social phenomena, providing a level of prediction and understanding in a particular context.