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| 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
aka theoretical/conceptual definition |
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| Statement of precicely which observable characteristics will be measured and the process of assigning value to the concept |
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| Set of symbols or numbers so constructed that tat the symbols or numbers can be assigned by a rule to the individuals 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 scales and have the ability to order data |
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Scales that have the characteristics of ordinal scales, plus equal intervals between points to show relative amounts
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 instruments to produce consistent results when used a second time under conditions as similar as possible to the original conditions |
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| Lack of change in results from test to retest |
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| Equivalent Form Reliability |
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| Ability of two very similar forms of an instrument to produce closely related 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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| Method of assigning the reliability of a scale by dividing the total set of measurement items in half and correlating the same 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 measure |
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| Representativeness, 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 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 underlying theory, the observed phenomenon to construct |
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| degree of correlation among different measurement instruments that purport to measure the same construct. |
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| Measure of the lack of association among constructs that are supposed to be different |
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