PSYC 201W Study Guide - Final Guide: Dependent And Independent Variables, Random Assignment, Vocab (Song)

• School: Simon Fraser University
• Department: Psychology
• Course: PSYC 201W
• Professor: Rose Vernon

Document Summary

Differential influence when the influence of an extraneous variable is different for each. Randomly assigning a sample of individuals to a specific number of comparison groups. Does not eliminate extraneous variables but equates them in each group so they are no longer a problem. Using a variety of techniques for equating participants on one or more variables. Holding variable constant across groups by only using participants that are the same on that variable. This does restrict the number of people that can be used and influences generalizability. Get participants who are different on this variable and test them to see how it affects the dv. Only use this if you are interested in the effects of the extraneous variable. Control participants receive all the consequences of the experimental participant s behaviour and have no control over the outcome. Each participant is matched with another on selected variables. Must be done with random assignment used to control for sequencing effects.