# 602

 methodology objective systematic rule governed observations (surveys and experiments). Evaluated by criteria of validity, reliability and generalizability. posi: Use quantitative methods to remain detached from respondents What are concepts and constructs? Concept: An idea that represents a class of objects (eg cats) or events (walking) or their properties (fast). Construct: a complex idea or concept formed from a synthesis of simpler ideas or concepts (concepts invented by scientists) Quant and qual variables Qualitative (or categorical) variables: variables whose values are discrete and designated by words. Quantitative variables: values come from a numerical continuum. Predictor variables variables that predict or explain other variables. outcome variables variables to be predicted or explained Antecedent presumed to casually precede predictor variables e.g. church predicts morality. Intervening (or mediating variables): variables that channel the effect of the predictor variable on the outcome variable (e.g. maybe church attendance -> bible reading -> morality). Moderators a variable that by itself may or may not predict and outcome variable- changes the strength or direction of an existing correlation or effect which axis predictor/outcome? what is the moderator predictor x axis, outcome y axismoderator major linear relationship the relationship b/w two variables. Spurious Extraneous third factor and neither variable involved in the correlation influenced the other. How are items related to a scale, index, or composite measure of a variable? Questions create a scale which is an index of composite measure of the construct, based on self-reports. The questions are items/indicators. Nominal classifying cases into categories. Tool or activity to measure an object which will be a variable, must be exhaustive and mutually exclusive (e.g. Sex: male/female). Ordinal classify cases into categories and then rank them (e.g. education level 1= high school, 2 bachelors, etc). Interval Ordinal measures + equal intervals (e.g. attitude toward marijuana use). Ratio interval measures + a meaningful (e.g. we know how much more \$4 is to \$1). Each level adds more info than the previous. Reliability whether or not we’re measuring something consistently (interchangeable w consistency). Validity whether or not we are measuring the variable that we aim to measure (accuracy) three types of reliability test-retest, inter-item and inter-coder test-retest Given the same group of respondents a test at two time points. And see whether scores at Time 1 correlate with scores at Time 2. Strong correlation indicates high reliability Inter-item reliability (internal consistency) Whether the items in a scale correlate with each other?- Cronbach’s alpha>= .6 acceptable, >= .7 satisfactory, >=.9 will be excellent. Inter-coder Whether or not different human judges (coders) produce similar results by using the same procedure and instrument?-Content analysis and nonverbal studies. Authorcalhounk1 ID353452 Card Set602 DescriptionMidterm Updated2020-10-13T18:15:30Z Show Answers