Describe cross-sequential research designs, identify two important confounds that they address, and explain how they rule out these confounds.
What will be an ideal response?
Ans: Varies.
Cross-sequential research designs test two or more age groups at two or more time periods. In essence, this design incorporates critical features of both cross-sectional and longitudinal designs and allows for the examination of time-lag effects. The two confounds it addresses are cohort and time-of-testing. Cohort effects are effects attributable to date-of-birth and not age, and time-of-testing confounds are effects caused by when a test was given and not age. The multiple measurements of the two different groups at different times allow for comparisons that rule out both of these effects.
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