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| Nonoverlap of All Pairs× | Tau-U× | |
|---|---|---|
| Fagområde | Social Work | Social Work |
| Familie | Process / pipeline | Process / pipeline |
| Oprindelsesår≠ | 2009 | 2011 |
| Ophavsperson≠ | Richard I. Parker & Kimberly J. Vannest | Richard I. Parker, Kimberly J. Vannest, John L. Davis & Stephanie B. Sauber |
| Type≠ | All-pairs nonoverlap effect size for single-case designs | Rank-based nonoverlap effect size that can correct for baseline trend |
| Oprindelig kilde≠ | Parker, R. I., & Vannest, K. J. (2009). An improved effect size for single-case research: Nonoverlap of all pairs. Behavior Therapy, 40(4), 357–367. DOI ↗ | Parker, R. I., Vannest, K. J., Davis, J. L., & Sauber, S. B. (2011). Combining nonoverlap and trend for single-case research: Tau-U. Behavior Therapy, 42(2), 284–299. DOI ↗ |
| Aliasser | NAP, Nonoverlap of All Pairs (NAP), Parker-Vannest NAP, All-Pairs Nonoverlap | Tau-U Single-Case, Parker Tau-U, Kendall Tau Nonoverlap, Tau-U Effect Size |
| Relaterede | 4 | 4 |
| Resumé≠ | Nonoverlap of All Pairs (NAP) is an effect-size index for single-case research that measures how completely a treatment phase separates from a baseline phase by examining every possible pairing of a baseline point with a treatment point. Introduced by Richard Parker and Kimberly Vannest in 2009 as an improvement on the Percentage of Nonoverlapping Data, NAP reports the proportion of those pairs in which the treatment point shows improvement, is mathematically equivalent to the area under a ROC curve and the Mann-Whitney statistic, and therefore carries a known sampling distribution that supports confidence intervals and significance testing. | Tau-U is a rank-based effect-size index for single-case research that combines the degree of nonoverlap between baseline and treatment phases with the trend within phases, and that can optionally subtract out any improving trend already present in the baseline. Developed by Richard Parker, Kimberly Vannest, and colleagues in 2011, it extends the Nonoverlap of All Pairs (NAP) statistic by adding a Kendall-style trend component, giving practitioners a single index that is robust to outliers, has a known sampling distribution for significance testing, and does not unfairly credit a treatment for change that the baseline was already heading toward. |
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