paugmented: Calculate paugmented

In ianhussey/ethicalpeeking: Calculate paugmented, pcrit, and pactual.

Description

This function calculates paugmented, a statistic discussed in Sagarin, Ambler, and Lee's (2014, Perspectives on Psychological Science, 9, 293-304) "An Ethical Approach to Peeking at Data".

Usage

paugmented(ns, plargest, pfinal, pcrit = 0.05, slices = 1000, tails = 2)

Arguments

ns	refers to a vector of sample sizes that indicate the initial number of participants run (N1) followed by the number of participants in the first round of augmentation (N2), the number of participants in the second round of augmentation (N3), etc.
plargest	refers to the largest p-value obtained in the initial or augmented subsamples. For example, if the p-value for the initial N1 participants was .15, the p-value for the combined N1+N2 participants was .18, and the p-value for the combined N1+N2+N3 participants was .04, plargest would be .18.
pfinal	refers to the p-value obtained in the final sample that includes all participants.
pcrit	refers to the value for determining statistical significance (typically .05).
slices	refers to the number of slices to divide the probability distribution (higher numbers of slices will make the calculations slower but more precise).
tails	refers to whether the tests are one- or two-tailed.

Examples

paugmented(c(40,40,20), plargest = .18, pfinal = .04, pcrit = .05, slices = 1000, tails = 2)
paugmented()

ianhussey/ethicalpeeking documentation built on May 18, 2019, 1:28 a.m.