Spatial Measurement Flashcards
Representationalism
Refers to the notion that measurement is a connection of numbers with entities that are not numbers.
Levels of Measurement
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Discrete groups
Cannot be divided - distinct and separate, cannot be transformed
Continuous
Measured and may take on any value within a finite or infinite interval
Stevens’ theorized four levels of measurement
Nominal
Ordinal
Interval
Ratio
Nominal
Determination of equality. Objects can be classified into groups.
Example:
Liberals
Ordinal
Determination of greater or less. Describes order but not the relative size or degree of difference between items measured.
Example: rating systems, ranking data
Interval
Quantitative attributes. Determination of equality of intervals or differences. Quantitative attributes are all measurable on interval scales, as any difference between levels of an attribute can be multiplied by any real number to exceed or equal another difference
arbitrary zero
Example: Celsius, Calendars
Ratio
Non arbitrary zero. Determination of equality of ratios. Most measurement in the physical sciences and engineering is done in the ratio scale e.g. mass, length, time, plane angle, etc.
Measurement is the estimation of the ratio between a magnitude of a continuous quantity and a unit magnitude of the same kind.
Example: kilograms, centimeters (ratio scales?)
Discrete (“noir”)
Nominal
Ordinal
Continuous (noir”)
Interval
Ratio
Likert Scale
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Interval scale explained
Interval scale places an object on a number line with an arbitrary zero
Derived Scale
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Extensive Scale
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