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Psych Research Pt 3

Properties and Scales of Measurement

TermDefinition
Nominal Scale only the identity property; no arithmetic operations are meaningful (ex: zip codes, football jersey #s)
Ordinal Scale only the identity and magnitude properties; no arithmetic operations are meaningful (ex: baseball rankings, class rank)
Interval Scale only identity, magnitude, and equal intervals properties; +/- meaningful (ex: fahrenheit and celsius temps)
Ratio Scale includes all properties; all arithmetic operations are meaningful (ex: weight in lbs, # correct on a test, kelvin temp.)
Identity Property different entities get different scores on the scale
Magnitude Property occurs when the ordering of values on the scale reflect the ordering of values of the trait being measured; quantitative, not categorical
Equal Intervals Property occurs when a difference of 1 represents the same amount of the trait being measured everywhere on the scale
Absolute Zero Property occurs when 0 on the scale represents a complete absence of the trait being measured (weight, kelvin)
Created by: 2144066352316258
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