CRIM 220 Lecture Notes - Lecture 3: Construct Validity, Sample Size Determination, Reductionism
8 Aug 2015
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Week 3 -- general issues in research design. ], time: how do you operational recidivism, defn all terms in research proj -_, how you state the problem frames the outcome, e. g. High recidivism criteria = results will show less recidivism etc: the kinds of questions: descriptive, how many vs what is. Types of empirical questions: descriptive questions, causal questions: why, asking how does a change in one variable have an impact on another variable. Correlational vs causal r/s: correlational: 2 variables varying in synchronized manner, causal: one variable responsible for change in another variable. Criterion for causality: empirical r/s i. e the variable are correlated: the variables covary (co-vary = co-related, e. g. smoking precedes cancer. In science and stats, validity is the extent to which a concept statement or measurement is well-founded and corresponds accurate to the real world: the world valid is derived from the latin validus meaning strong.
