measurement - Ex. Time spent watching television Ex. 70...

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Click to edit Master subtitle style  2/25/11 Measurement JOUR 304
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Variables -> Measurement o How we quantify this?  o Simple number counts? o Needed to make comparisons
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Categorical (Nominal) o Fits into a specified category o Sex o Political Affiliation o Class? (Freshman, Sophmore. .etc.) o Employment status o Mutually exclusive, exhaustive
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Continuous Ordinal (Rank, but not knowing how much) Ex. How often do you read newspapers? Never Hardly ever Sometimes Frequently Always Interval (High to Low) Ex. Grades 60-D 70-C 80-B 90-A
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Continuous Interval (High to Low) Ex. Likert Scale Do you agree or disagree with healthcare  reform? Strongly disagree,disagree,undecided,  agree,strongly agree Ex. Semantic Differential
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Continuous Ratio (True zero)
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Unformatted text preview: Ex. Time spent watching television Ex. 70 minutes, 249 minutes, 0 minutes Validity Measures what you want it to measure Internal validity: Relationship between concept and way its being measured Face validity: References what we want it to measure Content validity: Are we measuring everything we can about it? Validity Criterion-related: One measurement can be linked to some other external measurement Construct: Measurement reflects its theoretical foundations Reliability Degree to which measurement is dependable or consistent Internal reliability: Multiple items measuring some variable are highly related...
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measurement - Ex. Time spent watching television Ex. 70...

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