The concept describes a perspective on human growth positing that developmental changes are gradual and ongoing throughout the lifespan. This viewpoint contrasts with stage theories, which propose that development occurs in discrete, qualitatively different steps. For example, cognitive abilities might be viewed as steadily improving with accumulating experience, rather than undergoing abrupt transformations at specific ages.
Understanding this perspective is crucial in psychological research because it informs the design and interpretation of studies examining change over time. It highlights the significance of longitudinal studies that track individuals over extended periods, allowing researchers to observe subtle yet meaningful developmental shifts. Historically, this understanding emerged as a counterpoint to more discontinuous models, offering a nuanced appreciation for the incremental nature of many developmental processes.
