Based on the information provided, Dr. Marshall, a developmental psychologist studying adulthood, is most likely to research the development of object permanence. Object permanence is a concept in developmental psychology that refers to the understanding that objects continue to exist even when they are out of sight. This concept was first introduced by Jean Piaget, a renowned psychologist known for his work on child development.
Dr. Marshall may investigate how adults perceive and understand object permanence in various contexts. He might explore how this cognitive ability evolves throughout adulthood, how it impacts problem-solving skills, memory, or decision-making processes in grown-ups.
By researching object permanence in adults, Dr. Marshall could gain insights into how this fundamental concept continues to play a role in cognitive development beyond childhood and how it influences adult behavior and cognition.
In conclusion, Dr. Marshall, as a developmental psychologist focusing on adulthood, is likely to delve into the research of object permanence in adults to better understand its implications on cognitive processes and behaviors in mature individuals.
