Immediate Feedback and Causality
Going back to the ball example that we looked at in class, there was an instance where one ball “hit” another, and the second ball moved a couple of seconds after impact, while in another it moved right away. This touched on the point that in order for someone to conclude a causal relationship between the two, there has to be at most a 1/10 of a second difference between the first ball hitting the second ball and the second ball moving. In terms of designing, there has to be immediate feedback in order for the user to determine causality. We related this to the KAYAK website, and how when we changed the constraints on the sidebar, there was an automatic change on the website. As a result, the user understands that there is causality between changing those options and the results on the page. This is the association between immediate feedback and causality in an online example.