Test Construction
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| What is Differential Validity? | When different groups show different validity coefficients. This is what is suggested when you have different regression line slopes in a scatterplot. | |
| Factorial validity | Test or test items correlate with facotrs that they would be expected to correlate with. | |
| Convergent validity | Test correlates with similar constructs | |
| Divergent Validity | No correlation with unrelated construct | |
| Item Response Curve | Tells you the items difficulty level, ability to discriminate between those who are high and low on the characteristic being measured and the probability of answering the item correctly by guessing. | |
| Communality | Is a measure of common variance | |
| Pearson r | Both variables are on a continuous scale | |
| Spearman rho | Both variables expressed in ranks | |
| Biserial correlation coefficient | used when one variable is an artificial dichotomy and the other variable is continuous | |
| Point Biserial | One variable is true dichotomy and other is continuous | |
| KR-20 used: | Method for assessing internal consistency when test items are socred dichotomously | |
| When using Test/Retest reliability | It must measure a stable trait |
Quisition is a browser-based flashcard system that repeats old cards and introduces new ones at optimal time intervals. You can create your own card packs or use those developed by others.
