Terms : Hide Images
| 7897277902 | Completely Randomized Design | Treatments are assigned to experimental units entirely by chance. |  | 0 |
| 7897318221 | Block Design (Randomized Block Design) | Experimental units are first grouped by a similar characteristic, then randomly assigned treatments within those groupings. |  | 1 |
| 7897331726 | Matched Pairs Design | Special type of block design where two experimental units are put together based on identical or very similar characteristics (think twins). This is done many times, and for each set of experimental units, random assignment is used to determine which treatment each unit gets. | 2 | |
| 7897366628 | Observational Study | Where we collect data from individuals and measure variables of interest without attempting to influence the response | 3 | |
| 7897375505 | Experiment | Deliberately impose some treatment(s) on individuals to measure their response. | 4 | |
| 7897404303 | Elements of Good Experimental Design | Randomization, Replication, and Control. (Note that control does not mean we must have a control group specifically). | 5 | |
| 7897411858 | Lurking Variable | Some variable besides the explanatory or response variables that has an effect on the relationship being studied. | 6 | |
| 7897422610 | Confounding | When multiple variables are associated in a way that their effects on the response variable cannot be distinguished from each other. | 7 | |
| 7897436302 | Treatment | Specific condition applied to the individuals in an experiment. | 8 | |
| 7897440660 | Levels | Various values of the treatment applied to the individuals in an experiment. | 9 | |
| 7897449263 | Experimental Unit | Individuals to which treatments are being applied. Often referred to as subjects when they are people or animals. | 10 | |
| 7897461740 | Random Assignment (Randomization) | Using some sort of chance process to determine treatments in an experiment. This should help screen out lurking variables. | 11 | |
| 7897473026 | Replication | Being able to reproduce results of an experiment again in another version of the same experiment. or using enough experimental units in each treatment group so that chance differences can be ruled out. | 12 | |
| 7897499554 | Control | Using comparative design and ensuring that the only differences between two groups can be attributed to the treatments administered. | 13 | |
| 7897509499 | Common Response | When both the explanatory and response variable are being directly affected by another variable. | 14 | |
| 7897560839 | Placebo | A fake or dummy treatment used to sort out changes in the response variable due to the belief of receiving a treatment. | 15 | |
| 7897572788 | Placebo Effect | The change in the response variable that can be attributed to just receiving a treatment. | 16 | |
| 7897578761 | Blind | When either the subjects or those recording the data do not know who is receiving the various treatments. | 17 | |
| 7897590657 | Double-blind | When neither the subjects nor those recording the data know who is receiving the various treatments. | 18 | |
| 7897595970 | Statistically Significant | When an observed effect is so large it would rarely occur simply by chance. | 19 | |
| 7897603561 | Block | A group of experimental units that are similar in some way before the experiment is conducted. | 20 |
