Improving Estimation Quality with Psychology and Psychometrics

Here are some preliminary resources for our workshop.


Doing statistics in Excel is painful. For many people, though, there is no other choice. If you’re going to use Excel, download and install the Real Statistics Resource Pack available here.

As psychologists, we prefer to use the R programming language. You can download it here, and while you’re at it, download the RStudio development environment here.

Python is another programming language suitable for statistical analysis of estimation data. The fact that we currently provide no links here has nothing to do with our regard for the language, but only that we don’t know enough about it to provide proper download links.



Here is an Excel sheet that contain data that we use for our work.

R scripts

Here are some scripts in R.


Flyvbjerg, B. (2006) From Nobel Prize to Project Management: Getting Risks Right

This site will be updated whenever we find or produce new material.