Design and Analysis Tools

Web Applications

Several web applications have been developed so that trial designers can quickly create preference trials based on the desired power, sample size, and effect size. Each of these applications allow the designer to input trial specifications and return visualizations, a table of the trial design parameters, and R code to reproduce the design.

• Continuous Outcomes

  • Power
  • Sample Size
  • Effect Size Calculator

• Binomial Outcomes

  • Power
  • Sample Size

• Count Outcomes

  • Power
  • Sample Size

R-Package

For more sophisticated designs and for trial designers who are familiar with the R programming environment, there is an R package that can be install via the following command:

install.packages("preference")

The package code can be found on GitHub. Any problems, bugs, or suggestions for enhancements can be conveyed through the issue tracker.