Total = 30slides1Sociology 201:Social Research Design11. Composite MeasuresTotal = 30slides2Preview•Workbook assignments due: 6.2 (20 pts)•Indexes•Scales–Guttman–Likert–Thurstone–Bogardus•TypologiesTotal = 30slides3Continuation of measurement discussion:•conceptualization•operationalization•can use more than one indicatorTotal = 30slides4Three types of composite measures•Indexes•Scales•TypologiesTotal = 30slides5Overview of differences•Index is additive•Scale considers structure•Index/scale are unidimensional•Typology is multidimensionalTotal = 30slides6Index construction•Item selection•Prima facie validity•Bivariate relationships among items•Multivariate relationships among itemsTotal = 30slides7Index scoring•Default is equal weight•Bases for unequal–More important item•Skewed distributionTotal = 30slides8Handling missing data•Leave out cases•Assign average•Infer a value–Checked a few yeses but not any noes in a listTotal = 30slides9Index validation•Item analysis•External validation•Bad index versus bad validatorsTotal = 30slides10Note that student evaluations are an example of an indexTotal = 30slides11Scales•Contrasted with indexes•Index is additive•Scale considers intensity structure of itemsTotal = 30slides12Likert scaling•Questionnaire format and also basis for scaling•Standard format–Strongly agree–Agree–Disagree–Strongly disagree–UndecidedTotal = 30slides13Match terms to content of items•Strongly Approve/Disapprove•Definitely True/Untrue[False]•Definitely Like/Dislike•Very Important/Unimportant•Don't use with absolutes–SA/A/D/SD: "My mom is the best cook in the world”–Probably have to strongly disagree–Even if you like your mom’s cookingTotal = 30slides14Thurstone Scale•"Equal-appearing intervals”•Create hundreds of possible items•Have judges rate them 1-11•Look for high agreement at each levelTotal = 30slides15Bogardus Social Distance Scale•Would you be willing to have a serial killer:–Live in your country–Live in your city–Live in your neighborhood–Live next door to you–Marry your childTotal = 30slides16Typologies•Contrasted with indexes–Index is unidimensional–Typology is multidimensional•Ok as an Independent Variable•Problematic as a Dependent VariableTotal = 30slides17Example of TypologyLike jazz?YesYesNoNoLike classical?Total = 30slides18Preview Ch 8 Workbook Assignments •7.1: Random sample–Be sure to use the table of random numbers–Don’t just grab the ones you likeTotal = 30slides197.2: Stratified Systematic Sample•Be sure to stratify the population by gender before sampling•You should end up with right proportions of men and womenTotal = 30slides20Next Time•The Logic of Sampling•Read Chapter