This tutorial is designed to help you learn to identify the scale of measurement of variables encountered in psychological research. The tutorial begins with a presentation of the properties of the abstract number system that are used to identify different scales of measurement. It is followed by examples drawn from everyday life and psychological research. We recommend that you begin with everyday examples as they may be more familiar to you and then proceed to examples drawn from psychological research. Once you understand the different scales of measurement and their properties, you should test your knowledge by doing the practice exercises. The tutorial ends with a summary of all of the scales of measurement, their properties, and the descriptive and inferential statistics that may be used with each.
Students enrolled in PSYC230 - Elementary Statistics - who wish to receive extra credit for doing the tutorial should take the quiz posted on the Blackboard at Emory class site.