FRHD 3070 Lecture Notes - Lecture 5: Dependent And Independent Variables, Random Assignment, Fallacy

• School: University of Guelph
• Department: Family Relations and Human Development
• Course: FRHD 3070
• Professor: Hendry

Document Summary

Variables: situational variables, response variables, participant variables, mediating variables. Variables: defines the operations or techniques the researcher will use to measure or manipulate a variable, necessary for empirical study, help communicate ideas to others. Methods: non-experimental method: no manipulation of variables, description of behavior, experimental method: manipulation of variables, explanation of behavior, situational variable = independent variable (iv, response variable = dependent variable (dv) Experimental methods: cause and effect relationships between independent and dependent variables. Non-experimental methods: correlational method: measure covariation between two variables, no manipulation, just observation = no causation, direction & strength. Positive linear relationship: increases in one variable relate to increases in another. Negative linear relationship: increases in one variable relate to decreases in another. Curvilinear relationship: increases in one variable relate to both increases and decreases in another. No relationship: changes in one variable do not relate to changes in another.