KP290 Lecture Notes - Lecture 12: Sphygmomanometer, Construct Validity, Face Validity
21 Feb 2017
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Still working on defining your measures conceptually and operationally. Describes variables that are categorical in nature and that differ in quality rather than quantity. Describes variables that can be ordered along some type of continuum. Describes variables that have equal intervals between them but no absolute zero. Temperature (can"t have zero temperature, still temperature at. Ratio (best scale) zero but does not mean it has zero property) Describes variables that have equal intervals between them but also have an absolute zero. You want to use the most precise way as possible. The type of measurement determines the type of statistic that is used. Nominal and ratio are the most common levels of measurement. Use a ratio scale if possible most precise and offer the greatest amount of statistical possibilities. The tools we use to measure behaviour should be: Would you measure fitness the same way for children, seniors, etc. E. g. , how do you test for balance with parkinson"s.
