| A | B |
|---|
| Dependent variable | The outcome variable or the predictable variable in a regression equation. |
| Independent variable | The treatment variable that is manipulated or the predictor variable in a regression equation. |
| Scales of measurement | Different ways of categorizing measurement outcomes. |
| Nominal level of measurement | The most gross level of measurement where variables can be placed in categories. |
| Ordinal level of measurement | A level of measurement that is characterized by things being ordered. |
| Ratio level of measurement | A level of measurement defined as having an absolute zero. |
| Reliability | Able to be trusted to be accurate or to provide a correct result. |
| Observed score | The score that is recorded or observed. |
| True score | The unobservable part of an observed score that reflects the actual ability or behavior. |
| Test-retest reliability | A type of reliability that examines consistency over time. |
| Parallel forms reliability | A type of reliability that examines the consistency across different forms of the same test. |
| Internal consistency reliability | A type of reliability that examines the one-dimensional nature of an assessment tool. |
| Interrater reliability | A type of reliability that examines the consistency of raters. |
| Validity | The quality of a test such that it measures what it says it does. |
| Content Validity | A type of validity that examines how well a test samples a universe of items. |
| Criterion Validity | A type of validity that examines how well a test reflects some criterion that occurs in either the present (concurrent) or the future (predictive). |
| Concurrent Criterion Validity | A type of validity that examines how well a test outcome is consistent with a criterion that occurs in the present. |
| Predictive Criterion Validity | A type of validity that examines how well a test outcome is consistent with a criterion that occurs in the future. Construct Validity |
