# Shared Flashcard Set

## Details

POS 301
Chapter 4
22
Political Studies
02/16/2009

Term
 Alternative-Form Method
Definition
 A method of calculating reliablility by repeating different but equivalent measures at two or more points in time
Term
 Construct Validity
Definition
 validity demonstrated for a measure by showing that it is related to the measure of another concept
Term
 content validity
Definition
 validity demonstrated by ensuring that the full domain of a concept is measured
Term
 correlation matrix
Definition
 a table showing the relationships among discrete measures
Term
 dichotomous variable
Definition
 a variable having only two categories that for certain analytical purposes can be treated as a quantitative variable
Term
 face validity
Definition
 validity asserted by arguing that a measure corresponds closely to the concept it is designed to measure
Term
 factor analysis
Definition
 a statistical technique useul in the construction of multi-item scales to measure abstract concepts
Term
 Guttman scale
Definition
 a multi-item measure in which respondents are presented with increasingly difficult measures of approval for an attitude
Term
 Interitem association
Definition
 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
Term
 interval measurement
Definition
 a measure for which a one-unit difference in scores is the same throughout the range of the measurement
Term
 level of measurement
Definition
 the extent or degree to which the values of variables can be compared and mathematically manipulated
Term
 likert scale
Definition
 a multi-item measure in which the items are selected based on their ability to discriminate between those scoring high and those scoring low on the measure
Term
 measurement
Definition
 the process by which phenomena are observed systematically and represented by scores or numerals
Term
 nominal measurement
Definition
 a measure for which different scores represent different, but not ordered, categories
Term
 operational definition
Definition
 the rules by which a concept is measured and score assigned
Term
 ordinal measurement
Definition
 a measure for which the scores represent ordered categories that are not necessarily equidistant from each other
Term
 ratio measurement
Definition
 a measure for which the scores possess the full mathematical properties of the numbers assigned
Term
 reliability
Definition
 the extent to which a measure yields the same results on repeated trials
Term
 Split-Halves method
Definition
 A method of calculating reliability by comparing the results of two equivalent measures made at the same time
Term
 summation index
Definition
 a multi-item measure in which individual scores on a set of items are combined to form a summary measure
Term
 test-retest method
Definition
 a method of calculating reliability  by repeating the same measure at two or more points in time
Term
 validity
Definition
 the correspondence between a measure and the concept it is supposed to measure
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