What is a cross-sequential design?

A cross-sequential design is indeed a method that combines elements of both longitudinal and cross-sectional designs. This approach allows researchers to observe the same participants over various points in time, as seen in longitudinal studies, while also incorporating different groups of participants at various ages, akin to cross-sectional studies. This duality is beneficial because it allows for the examination of age-related changes and developmental trends within the same study while accounting for cohort effects that can influence the results.

For instance, using a cross-sequential design, a researcher might examine different age groups of children over several years, which could yield insights into how specific traits or behaviors develop as individuals age, as well as how these traits may differ among cohorts due to environmental or contextual factors. This makes cross-sequential designs particularly valuable in developmental psychology, as they can provide a more comprehensive understanding of developmental changes than either design used alone.