| A | B |
| Action Research | Investigates specific classroom problems |
| Experimental Research | Manipulation of factors that may influence subjects |
| Variable | A concept or characteristic that involves variations |
| Independent Variable | Precedes, influences, or predicts the dependant variable |
| Dependent Variable | Affected or predicted by the independent variable |
| Extraneous Variable | Source of error affecting the results |
| Confounding Variable | Varies systematically with the independent variable |
| Hypothesis | Tentative predictions or expectations |
| Research Hypothesis | Statement of expected results |
| Statistical Hypothesis | Statistical statement of possible results |
| Null Hypothesis | Statistical statement that no significant difference or relationship exists |
| Non experimental Research | No manipulation of factors that may influence subjects;descriptive and comparative |
| Qualitative | Emphasizes natural settings, understanding, verbal narratives, and flexible designs |
| Quantitative | Emphasizes numbers, measurements, deductive logic, control, and experiments |
| Theory | Explains relationships among phenomena |
| Educational Research | Disciplined inquiry applied to educational problems |