PSYC 201W Chapter Notes - Chapter 5: Level Of Measurement, Reference Group, Face Validity
4 Apr 2018
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Psyc 201w: measuring variables and sampling (chapter 5) Variable: a condition or characteristic that can take on different values or categories. Measurement refers to the act of measuring, and it is conducted by assigning symbols or numbers to something per a specific set of rules. Nominal scale: most basic type of measurement, nonquantitative scale of measurement because it identifies types rather than amounts of something, used to name, categorize, or classify, examples: personality type, birthplace, college major. b. ) Is the highest scale of measurement: most quantitative level of measurement, has an absolute zero point, as well as the characteristics of the lower- level scales. Income, group size: can say twice as big or twice as tall. Internal consistency: consistency with which items on a test measure a single construct: coefficient alpha: the most frequently used index of internal consistency. (0. 70 or higher) Interrater reliability: the degree of consistency or agreement between two or more scorers, judges, observers, or raters.
