PSYC 2001 Lecture 11: Lecture 11 and 12-ACER-3
Document Summary
Experimental research designs are the pinnacle of systematic empiricism. Does time spent studying cause better ap: operationalization: (specification) The one you play to see if it has an effect on the outcome. How do ed deal with the directionality problem: from the start, you control one variable and play with the other variable to see the outcome. How do ed deal with the 3rd-variable problem: random assignment. Do ed guarantee that the most significant independent variable have been selected for study: no, it can only be guaranteed once the study is finished and the effect size is calculated within a population. Effect size tells you if it is important. Do ed guarantee that all threats to internal validity have been eliminated: no, there is no perfect experiment. You"ll try to make it solid as possible but you can always change it. That"s why replication is crucial, getting the same result over and over again.
