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Lecture Notes Feb 11.13.15.docx

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University of Guelph
Sociology and Anthropology
SOAN 2120
Scott Schau

Lecture Notes Monday Feb 11 2013Bad index vs bad validators if an internal item analysis shows inconsistent relationships between items included in an index and the index itselfsomething is wrong with the index if the index fails to predict strongly the external validation itemsconclusion is ambiguouschoose between 2 possibilities1 index does not adequately measure the variable in question 2 validation items do not adequately measure the variable and thereby do not provide a sufficient text of the indexScale Construction not all indicators of a variable are really important or equally strong each item going into a composter measure may have a different intensity in terms of the variablescales offer more assurance of ORDINALITY by tapping the intensity structures among the indicators 4 scaling procedures1 bogardus social distance scale measures the wiliness of ppl to participate in social relationsof varying degrees of closenesswith other kinds of people clear differences of intensity suggest a structure among the itemsranges from easy items to hard items by knowing how many relationships a respondent will accept we know which relationships will be acceptedeg give me your first reaction yes or no whether you personally would feel comfortable having an exchange student from country2 thurstone scales complicated and time consuming rarely ever used3 likert scaling item format created by Likert is one of the most commonly used in contemporary questionnaire design ordinality of response categoriesstrongly agree agree disagree strongly disagree question format used to determine the relative intensity of different itemstrue Likert scale seldom used because of its complexity 4 guttman scaling based on the fat that some items may be more extreme indicators of the variable than others steps for constructing a Guttman scale st 1 examine the face validity of items available to analysis
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