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Measurement Intro

Across
Accuracy/agreement among repeated measures of the same variable
The variable being manipulated
Given a measure (X), this is the difference between the true value and the observed score: X = T +/- E
Exactness of measure
Assigning numbers to variables to represent quantities of characteristics according to a set of rules
Interval + Absolute Zero
E.g., MMT
Refers to a variable that can take on any value along a continuum
Down
Ability of a measure to capture what it is intended to measure
Refers to a variable describe only in whole units
Lowest level of measurement
Rank order characterized by equal distances or intervals between the units
A discrete variable with only 2 categories
A variable that may influence the dependent variable
Abstract variable
The outcome of interest
Characteristics of subjects, objects of environmental conditions that may have more than one value