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Definition
A method of calculating reliablility by repeating different but equivalent measures at two or more points in time 


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validity demonstrated for a measure by showing that it is related to the measure of another concept 


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validity demonstrated by ensuring that the full domain of a concept is measured 


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a table showing the relationships among discrete measures 


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a variable having only two categories that for certain analytical purposes can be treated as a quantitative variable 


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validity asserted by arguing that a measure corresponds closely to the concept it is designed to measure 


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a statistical technique useul in the construction of multiitem scales to measure abstract concepts 


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a multiitem measure in which respondents are presented with increasingly difficult measures of approval for an attitude 


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a test of the extent to which the scores of several items, each thought to measure the same concept, are the same. results are displayed in a correlation matrix 


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a measure for which a oneunit difference in scores is the same throughout the range of the measurement 


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the extent or degree to which the values of variables can be compared and mathematically manipulated 


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a multiitem measure in which the items are selected based on their ability to discriminate between those scoring high and those scoring low on the measure 


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the process by which phenomena are observed systematically and represented by scores or numerals 


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a measure for which different scores represent different, but not ordered, categories 


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the rules by which a concept is measured and score assigned 


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a measure for which the scores represent ordered categories that are not necessarily equidistant from each other 


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a measure for which the scores possess the full mathematical properties of the numbers assigned 


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the extent to which a measure yields the same results on repeated trials 


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Definition
A method of calculating reliability by comparing the results of two equivalent measures made at the same time 


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Definition
a multiitem measure in which individual scores on a set of items are combined to form a summary measure 


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Definition
a method of calculating reliability by repeating the same measure at two or more points in time 


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Definition
the correspondence between a measure and the concept it is supposed to measure 

