Research evaluating information visualization implementations tends to focus on traditional desktop and mobile devices; in the same vein, telepresence studies evaluating immersive environments tend to overlook aspects of the user experience that are fundamental to the analytical task performance goal of cognitively-demanding work. At the intersection of visual analysis systems and techniques in immersive environments, unique challenges and opportunities arise that extend beyond taking an additive approach in combining methodologies. We present the results of a design study involving professional economists using a Virtual Reality (VR) system for multidimensional visualization, ImAxes, to explore real economic data. Our evaluation combines methods from human-computer interaction (HCI), telepresence survey methodology, and computer vision, and we use these methods as a basis of a path toward reproducible evaluation in immersive analytics.