The cross-sectional method is subject to the generational effects of having been born at a particular point in history, which is called the a. generational correlation b. historical bias c. age-related differences d. cohort effect

Aresearcher conducts a focus group to learn about attitudes towards hygiene and disease prevention. two weeks after the focus group, the researcher learns one of the subjects had a heart attack at home and was hospitalized, but made a full recovery. based on dhs regulations, the researcher report this event to the irb? no, this does not need to be reported since the subject had the heart attack when they were home, not at the focus group.no, this does not need to be reported since it is unrelated to participation in the study.no, this does not need to be reported because two weeks have passed.no, this does not need to be reported since the subject recovered.

The principle that the geoglical processes that we see today have occurred through out earths history is called

How has our understanding of the first sentence of the declaration of independence changed over time?