PSYCX1015 Lecture 8: Psych Lab Lecture 3-24-17
24 Mar 2017
School
Department
Course
Professor
Document Summary
We only know some number of the following relationships exist. Note: we"ll now call those z variables (cid:361)confounding variables(cid:362) when they are relevant to our study. In an experiment, we want to create two groups with just one meaningful difference between them and compare them. We use numerous methods to control all other differences between the groups. This control is the most difficult and important part of the experimental research. The general experimental method: create two (or more groups representative of a population and equal on every possible measure, cause a single difference to exist between those groups (manipulate an. Measure something to look for a difference between the groups caused by the difference we created (measure a dependent variable) Steps 2 and 3 are usually very easy. It may be impossible, but we can approximate it with proper experimental techniques. Define a population and draw a random (as possible) sample from it.
