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Experimental Design
| Term | Definition |
|---|---|
| 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
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