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| An abstract idea or notion |
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| A way to interpret a concept. |
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| How you define and measure a concept. |
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| How do question sets reduce the likelihood of idosyncratic variation (error) ? |
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Definition
| It takes multiple questions and combines them into one measurable scale. |
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| A way to meaure a set of questions |
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Sum or average of the questions.
The averages out of error. |
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Definition
Qualitative
When a variable measures in kind or quality but not amount.
ex) Gender, race, or type of car |
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First quantitative level
Order only
Fixed distance between units
Greater than, less than
ex) Education |
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Quantitative
Fixed measurement units, but no fixed zero point
Can't use division or multiplication
Can use addition or subtraction
ex) Tempurature or IQ |
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Highest precision quantitative measure
Fixed measurement units and fixed zero
Can use (+, -, /, x)
ex) Money, Age
You always want this measurement |
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| Degree to which a measure measures what it is supposed to measure. |
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| How well something measures something by the way it looks. |
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The content within the experiement is valid.
Compare with the topic of subject to check for validity. |
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| There is a casual relationship between the variables being studied. |
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| The causal relationship discovered can be generalized to other people, times and contexts. |
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The degree to which a measurement instrument gives the same results each time that it is used
Consistency! |
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Reliability is consistency and how accurate the measure is.
Validity is how well a measure measures what it was supposed to measure. |
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Definition
| takes a score from a sample of behaviors and applies them to the entire possible set of observations. |
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| Entire group of people in a society |
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