Author name: Erik Marsja

PhD in Psychology, Linköping University. Main interest is experimental and cognitive psychology. Enjoy programming in Python and R.

Python apps and libraries for creating experiments

In this post, I will describe the existing free Python applications and libraries for creating experiments.  So far, I have only used PsychoPy, but I plan to test most of them. At least the ones that seem to be still maintained. All applications and libraries are open-source, which makes it possible to download the source […]

Python apps and libraries for creating experiments Read More »

reverse scoring in R

Reverse Scoring using R Statistical Environment

In this tutorial, you will learn how to do reverse scoring in R. Specifically, we will use 1) base R to reverse selected variables (e.g., questionnaire items), and 2) we will use the Psych package. Reverse scoring Many instruments (e.g., questionnaires) contain items phrased so that a strong agreement indicates something negative (e.g., “When there

Reverse Scoring using R Statistical Environment Read More »

Scroll to Top