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Definition
| Process of assigning numbers or labels to persons, objects, or events in accordance with specific rules for representing quantities or qualities of attributes |
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| Guide, method, or command that tells a researcher what to do |
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| Specific types of concepts that exist at higher levels of abstraction. |
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| Statement of the meaning of the central idea or concept under study, establishing its boundaries; also known as theoretical, or conceptual, definition. |
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| Statement of precisely which observable characteristics will be measured and the process for assigning a value to the concepts |
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| Set of symbols or numbers so constructed that the symbols or numbers can be assigned by a rule to the individuals (or their behaviors or attitudes) to whom the scale is applied |
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| Scales that partition data into mutually exclusive and collectively exhaustive categories. |
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| Scales that maintain the labeling characteristics of nominal sales and have the ability to order data. |
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| Scales taht have the characteristics of ordinal scales, plus equal intervals between points to show relative amounts; they may include an arbitrary zero point. |
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| Scales that have the characteristics of interval scales, plus a meaningful zero point so that magnitudes can be compared arithmetically. |
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| Degree to which measures are free from random error and, therefore, provide consistent data |
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| Ability of the same instrument to produce consistent results when used a second time under conditions as similar as possible to the original conditions. |
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| equivalent form reliablility |
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| Ability of two vary similar forms of an instrument to produce closely correlated results. |
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| internal consistency reliability |
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Definition
| Ability of an instrument to produce similar results when used on different samples during the same time period to measure a phenomenon. |
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Definition
| Method of assessing the reliability of a scale by dividing the total set of measurement items in half and correlating the results |
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| Degree to which what the researcher was trying to measure was actually measured. |
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| Degree to which a measurement seems to measure what it is supposed to measured |
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| Representatives, or sampling adequacy, of the content of the measurement instrument. |
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| criterion-related validity |
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| Degree to which a measurement instrument can predict a variable that is designated a criterion. |
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| Degree to which a future level of a criterion variable can be forecast by a current measurement scale. |
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| Degree to which another variable measured at the same point in time as the variable of interest, can be predicted by the measurement instrument. |
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| Degree to which a measurement instrument represents and logically connects, via the underlying theory, the observed phenomenon to the construct. |
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Definition
| Degree of correlation among different measurement instruments that purport to measure the same construct |
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Definition
| Measure of the lack of association among constructs that are supposed to be different. |
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