discAUC: Linear and Non-Linear AUC for Discounting Data
Area under the curve (AUC; Myerson et al., 2001) <doi:10.1901/jeab.2001.76-235>
is a popular measure used in discounting research. Although the calculation of
AUC is standardized, there are differences in AUC based on some assumptions.
For example, Myerson et al. (2001) <doi:10.1901/jeab.2001.76-235>
assumed that (with delay discounting data) a researcher would impute an
indifference point at zero delay equal to the value of the larger, later outcome.
However, this practice is not clearly followed. This imputed zero-delay indifference
point plays an important role in log and ordinal versions of AUC.
Ordinal and log versions of AUC are described by Borges et al. (2016)<doi:10.1002/jeab.219>.
The package can calculate all three versions of AUC [and includes a new version: IHS(AUC)],
impute indifference points when x = 0, calculate ordinal AUC in the case of Halton
sampling of x-values, and account for probability discounting AUC.
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