What is a cross-sectional study?
Observation of an entire population, at a defined time
Pros- Quick and easy
Cons- Uninformative about changes over time
What is a longitudinal study?
Observation of the same subject, over a long period of time
Pros- Reveals patterns of change over a long period of time
Cons- Difficult to keep participants in the study
What is a microgenetic study?
Observtion over a short period of time, while an environmental change is occuring
Pros- Reveals repsonse to changes
Cons- Does not reveal patterns of change over a long period of time
Who believed there was a pre-formed human inside sperm?
Types of Studies