ACC 342 Lecture Notes - Lecture 7: Repeated Measures Design
Measurement
In research, consists of assigning numbers to empirical events, objects or properties, or activities in
compliance with a set of rules
3 part process of Measurement
1.) Selecting observable empirical events
2.) Developing a set of mapping rules
3.) Applying the mapping rules to each observation of that event
Mapping Rules
A scheme for assigning numbers or symbols to represent aspects of the event being measured
Four characteristics of mapping rules
1.) Classification
2.) Order
3.) Distance
4.) Origin
Mean
The average
Median
The midpoint of a distribution
Mode
The value in the data set that occurs most often
Equivalence
When an instrument secures consistent results with repeated measures by the same investigator or
different samples
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Document Summary
In research, consists of assigning numbers to empirical events, objects or properties, or activities in compliance with a set of rules. Applying the mapping rules to each observation of that event. A scheme for assigning numbers or symbols to represent aspects of the event being measured. The value in the data set that occurs most often. When an instrument secures consistent results with repeated measures by the same investigator or different samples. Scale with the properties of order and equal distance between points and with mutually exclusive and exhaustive categories. A scale with the properties of categorization, order, equal intervals, and unique origin. The extent to which a test measures what we actually wish to measure. The accuracy & precision of a measurement procedure. Is concerned with a wide range of factors of economy, convenience, and interpretability. Ability of a research instrument to measure what it is purposed to measure.
