A key feature of a time-sequential design is that it isolates which of the following effects?

Question

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A time-sequential design is used to isolate the effect of time of measurement and cohort. This design involves comparing multiple age cohorts at different points in time, allowing researchers to determine whether age differences or changes over time are due to the aging process or other factors such as cohort effects (i.e. differences in experiences, values, or cultural norms among different generations). Practice effects and individual differences such as age are controlled for by using multiple cohorts at different points in time.

A Key Feature of a Time-Sequential Design Is That It