Final answer:
Dr. Hammond most likely specializes in developmental psychology, which focuses on physical, cognitive, and psychosocial changes that occur throughout a person's lifespan, drawing from theories like those of Freud, Erikson, Piaget, and Kohlberg.
Step-by-step explanation:
Dr. Hammond, who studies the changes that take place in people over the course of their lifespans, most likely specializes in developmental psychology. Developmental psychology is the scientific study of how and why human beings change over the course of their life. This field of psychology focuses on changes across three developmental domains which are not limited to physical maturation but also include cognitive skills, moral reasoning, social behavior, and other psychological attributes. The domains are physical, cognitive, and psychosocial development.
Developmental psychologists assess how individuals progress from infancy through to childhood, adolescence, adulthood, and eventually old age, incorporating various psychological theories and methods, such as those proposed by Sigmund Freud, Erik Erikson, Jean Piaget, and Lawrence Kohlberg. These theories address issues such as whether development is continuous or discontinuous, the pathways development follows, and the influences of nature and nurture on people's growth and change.