| a prediction or assumption about behavior that is tested through scientific research | | |
| an in-depth study of a single person or group to reveal some universal principle | | |
| a controlled scientific procedure to determine whether certain variables manipulated by the researcher will have an effect on other variables | | |
| a method of research that looks at different age groups at the same time in order to understand changes that occur during the life span | | |
| in an experiment, the group that does not receive the treatment | | |
| in an experiment, the group that receives the treatment | | |
| a method of research in which the same people are studied over a long time per | | |
| the factor that is being measured and that may change in response to manipulation of the independent variable | | |
| the factor that is manipulated by the researcher to determine its effect on another variable | | |
| the relationship between variables | | |