PS296 Chapter Notes - Chapter 2: Dependent And Independent Variables
Document Summary
Scales of measurement: characteristics of relation among number assigned to objects. Nominal scales: numbers used only to distinguish among others, used for classification, name things. Ordinal scales: numbers used only to place objects in order, order or rank things. Interval scales: scale on which equal intervals b/w objects represent equal differences differences are meaningful, differences between scale points, equal intervals represent equal differences. Ratio scales: scales with a true zero point- ratios are meaningful, allow us to use phrases such as half as much . Variables: variables = properties of objects or events that can take on different values, discrete variables: variables that take on a small set of possible values, continuous variables: variables that take on any values. Independent variables: those variables control by the experimenter: dependent variables: the variables being measured; the data or score. Random assignment: the allocation or assignment of participants to groups by a random process.
