You’ve read in Cooper ch. 8 that one of the main goals of applying design principles to interfaces is to minimize work. This is, indeed, consistent with the assumptions about humans of information foraging theory. The same principle, sometimes simply referred to as “make it easy” applies to many other domains, such as persuasion, marketing, fundraising. In general, if you hope people will do something, you have to make it easy for them to do so. The same does not apply to professors… It is our job to make it hard
Now, think about your usability testing instruments and protocol: How do you minimize work? How do you make it easy for the research participant? How do you make it easy for the research team? Can you point out some of the (many) specifics things you do to minimize work?