Final answer:
Juliana's belief that cognitive development is gradual relates to the issue of continuity vs. stages in developmental psychology.
Step-by-step explanation:
Juliana's viewpoint that cognitive development involves gradual and almost unnoticeable changes over time relates to the issue of continuity vs. stages. This concept is a major issue in developmental psychology that addresses whether changes in development happen smoothly over time, as Juliana suggests, or in distinct stages.
The idea of continuous development posits that development is a cumulative process, where improvements on existing skills occur gradually. In contrast, the discontinuous development approach, as proposed by stage theorists like Jean Piaget, suggests that development progresses through unique, clearly defined stages, occurring at specific times or ages, typically marked by sudden changes in a person's abilities or behavior.