Contains methods for observed-score linking and equating under the single-group, equivalent-groups, and nonequivalent-groups with anchor test(s) designs. Equating types include identity, mean, linear, general linear, equipercentile, circle-arc, and composites of these. Equating methods include synthetic, nominal weights, Tucker, Levine observed score, Levine true score, Braun/Holland, frequency estimation, and chained equating. Plotting and summary methods, and methods for multivariate presmoothing and bootstrap error estimation are also provided.
| Package: | equate |
| Version: | 2.0.8 |
| Date: | 2022-06-05 |
| Depends: | R (>= 4.1.0) |
| License: | GPL-3 |
Index:
| ACTmath | ACT Mathematics Test Scores |
| KBneat | Test Scores Under a NEAT design |
| PISA | Programme for International Student Assessment 2009 USA Data |
| descriptives | Descriptive Statistics for Frequency Tables |
| percentiles | Percentile Ranks and Cumulative Frequencies for Frequency Tables |
| equate | Observed Score Linking and Equating |
| composite | Composite Linking and Equating |
| bootstrap | Bootstrap Equating Error |
| freqtab | Frequency Distribution Tables |
| presmoothing | Frequency Distribution Presmoothing |
| plot.freqtab | Plotting Frequency Distributions |
| plot.equate | Plotting Equating Results |
Further information is available in the following vignettes:
equatevignette |
equate vignette (source, pdf) |
The package vignette provides an introduction to linking and equating and includes
descriptions of the supported equating methods and examples. The help page
for the main function of the package, equate, contains
additional examples.