One of the leading centers of research on GT has been Center for Advanced Studies in Measurement and Assessment at the University of Iowa, where Dr. Robert Brennan has worked for many years. Check out their website at http://www.education.uiowa.edu/ centers/casma/ for excellent resources on measurement in general but also for GT in particular. There are notices for conferences and workshops, usually on advanced measurement topics; research reports; and monographs, again usually on topics that are extensions and more advanced than the material in this book (but if you are inspired by all means dig into them!). Click on the Computer Programs section of this page and download the three different GT analysis programs, under the rubric GENOVA Suite Programs: GENOVA, urGENOVA, mGENOVA. 

Each of these programs is designed for different types of GT analyses and designs. When you download the programs, a PDF manual accompanies each program. Open each of these manuals and read it, focusing on the types of data that can be analyzed with each different version as well as the types of different statistics each can compute. Pretend that you are reviewing these software packages for your company because your boss is interested in running GT analyses in the future. Your boss would be interested in the following questions: 

1. Why types of designs can each piece of software best handle? How are the three different pieces of software distinguished from each other? 

2. Exercise 22.1 presents a scenario where you have a series of items being responded to by two judges over a period of time. Which program would be best to analyze those data? 

3. The Highhouse et al. project used one of these programs to analyze their data. Based on your understanding of their project, which of the three software programs would be most appropriate?