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Experimental Design

hypothesis educated prediction of the outcome of the experiment
population the entire group of people about whom you would like to know something
sample the process of selecting a representative group from the population under study
randomization of sample the process of making groups of items random (in no predictable order)
representative sample a selected segment of a group that closely parallels the population as a whole in terms of the key variables under examination
independent variable the variable that the researcher will actively manipulate and, if the hypothesis is correct, that will cause a change in the dependent variable
dependent variable the variable that should show the effect of the independent variable
operational definition a description of something in terms of the operations (procedures, actions, or processes) by which it could be observed and measured
control group the participants in an experiment who are not exposed to the independent variable
experimental group the participants in an experiment who are exposed to the independent variable
random assignment each participant has an equal chance of being placed into any group
replication a way to test an existing experiment result in order to reproduce similar results using similar conditions and methods
extraneous variables any variable that you're not investigating that can potentially affect the dependent variable of your research study
Created by: evelyn.hopping
Popular Psychology sets




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