HLTHAGE 2A03 Lecture Notes - Lecture 19: Natural Disaster, Placebo, Confounding
9 Dec 2016
School
Department
Course
Professor
Document Summary
Classical experimental design - example watching the docs. Everything learnt about creating a questionnaire is relevant to this example. A false treatment that is considered to have no effect on an experiment. It should be similar to the stimulus but will not impact the experiment. Placebos aren"t standard to the classical experiment but they are often used. There will be a difference on posttest and pretest scores if the hypothesis is true. Confounding effect - to mingle so that the elements cannot be separated or ___ Quasi-experiments- not a full experiment because they are missing randomization and only use one group so it can be difficult to infer causality. Qualitative scholars use this because they look at naturally occurring situations. There is no r so randomization has not happened, a pretest is missing and a control group. 80 people are asked to watch the docs and then they get a questionnaire and then they get the posttest.
