Kinesiology 2032A/B Lecture Notes - Lecture 10: Level Of Measurement, Face Validity
6 Mar 2019
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Face validity: the degree to which a measurement device appears to accurately measure a variable. It doesn"t make sense that forehead length and intelligence would be related. 2 or more categories that have no numerical (less than or greater than) properties. Categories or groups simply differ from one another. Ie. gender, classi cation of undergrads according to major. In an experiment, the independent variable is often nominal: ordinal. Measurement categories form a rank order along a continuum (ie. rst to last) Ie. movie rankings, 1st place-3rd place: interval. Intervals between numbers on the scale are all equal in size. The difference between the numbers on the scale is meaningful. Ie. the difference between 1 and 2 is the same as between 2 and 3. Ie. temperature there is no absolute 0 (absence of temperature) Cannot form ratios (one number on the scale does not represent itself twice as much as another number: ratio.
