Kappa effect

The Kappa effect is a term relating to the human perception of time. This effect is noted in the study of psychology.

Concept
The Kappa effect can be displayed when considering a journey made in two parts that take an equal amount of time. Between these two parts, the journey that covers more distance will appear to take longer than the journey covering less distance, even though they take an equal amount of time. Practically speaking, a faster journey over more distance will still appear more time-consuming than a slower journey over less distance.

Related concepts
Another phenomenon in human psychology, the "Tau effect", describes a related effect also dealing with two equidistant parts in a journey: the part of the journey that takes more time to complete will appear to have covered more distance. In essence, a slower journey will appear to cover more ground than a faster one, since it takes more time to do so.