Supplemental R Scripts and output files for Designing, understanding and modelling two-phase experiments with human subjects. Statistical Methods in Medical Research, 31(4), 626-645.

R scripts and their pdf output files are provided for designing and analyzing the Farewell and Herzberg (2003) example of a human training experiment and for producing an alternative design that employs a row-column design for the second phase. (Also available with the peer-reviewed publication linked on the right.)The following files are available here:FHdesign.r: R script to produce and investigate the Farewell and Herzberg Plaid design (output in FHdesign.pdf).FHanal.r: R script to conduct a mixed-model analysis of the Farewell and Herzberg data (output in FHanal.pdf). This script requires the R data file plaid.dat.rda that contains the Farewell and Herzberg data in a suitable format and the file global.r that is sourced by FHanal.r and sets constants and functions used in the script.FHpower.r:R script to do a power simulation for the Farewell and Herzberg design (output in FHpower.pdf). This script requires the R data file plaid.dat.rda that contains the Farewell and Herzberg design and the file globalPower.r that sets constants and functions used in the script.globalPower.r:R script to sets constants and functions. It is sourced by the scripts FHpower.r and Altpower.r.AltRowColDesign.r:R script to produce and investigate an alternative second-phase design employing a row-column design and groups of patients assigned to different raters (output in AltRowColDesign.pdf).Altpower.r:R script to do a power simulation for the row-column design (output in Altpower.pdf). This script requires the R data file AltRowColDesign.RData, produce by AltRowColDesign.r and the file globalPower.r that sets constants and functions used in the script.