types of study design

[@ProfBoggs]

Thanks for making this available. I find the difference between analytic and descriptive studies interesting, and it makes me wonder about how different disciplines make these distinctions.During my PhD (in geography) I had learned that analytical studies used techniques with a clearly specified dependent and independent variables, whereas descriptive studies did not. I think I like your epidemiological/environmental health approach better, because it also incorporates experimental design (something we never had given our reliance on observational and not experimental data).

[@BSN4year]

I am watching it in 2024🎉🎉🎉🎉🎉

[@Jenny-mo9ug]

Thank you so much for making these!

[@somcana]

Thank you very much. you explained everthing in a nutshell.

[@wallmethod]

Thanks! :)

[@dipaksutar8258]

Thanks for making a easy and understandable presentation

[@anthonycarbonaro7890]

Very excellent… Thank you

[@samihaddad8430]

hey
i wanna ask you >> in the slides that the doctor gave me ,he says that when i want to make a research question i should know my literature >>> what does that means ?? ??

[@ElizabethLynch]

It means knowing what other studies have been done on the topic and which questions are unanswered or findings need to be replicated. The purpose of these videos is to teach you how to interpret research findings and the quality of the research in the literature. The "literature" refers to the scientific studies that have been published.

[@samihaddad8430]

thanks a lot :))
in the last lecture my Dr started speaking about '' sampling methods '' and i am having hard time understanding the following regarding stratified sampling :
-For a given sample size, reduces error compared to simple random sampling IF the groups are different from each other
-Tradeoff between the cost of doing the stratification and smaller sample size needed for same error
-Probabilities of selection may be different for different groups, as long as they are known
- Over sampling small groups improves intergroup comparisons
plz help :) :)

[@remyohajinwa229]

Elizabeth Lynch
I am a student, I am at my PhD research phase, I have soem uniques issues to sort out,Can I ask some questions personall, pls can I have your contact please? my email:[e-mail]

[@feliciakagiso2099]

Does smoking cause lung cancer? which study design is suitable for that question and why?

[@user-un7ul7rx7o]

Thank you

[@arsenal78910]

isnt cross-sectional observational design?

[@tesfahun_taddege]

Definitely, Observational.

[@hedleypanama]

All descriptive studies are observational! Some analytical studies are, but others aren't!