User Study

I'm reading a CHI paper recently and noticed some techniques and terminologies in it that may be useful for my future user studies.

Counterbalancing

Definition: a within-subjects design involves changing the order in which treatment conditions are administered from one participant to anther so that the treatment conditions are matched with respect to time. The goal is to use very possible order of treatments with an equal number of individuals participating in each sequence. The purpose of counterbalancing is to eliminate the potential for confounding by disrupting any systematic relationship between the order of treatments and time-related factors [1].

Sources:
1. Gravetter. F., and Forzano L.. Research Methods for the Behavioral Science. 259.