Lecture 16 – Observational Research
What is it?
• Aim to find relationship (CORRELATIONAL, not causal)
Can utilize the following data types
• Cross sectional
o A subtype of prospective design, has a very long follow up time
Ie. prospective follow up time (5 weeks)
Longitudinal follow up time (20 years)
o In conventional sense, the difference between Longitudinal and
Prospective is that longitudinal has a much longer lag time in follow up
(post measure) than Prospective.
• Is it possible to be obese and healthy?
o Ethics and Logistics don’t allow for the experimental design shown in the
o Other possib