“…They seem to be everywhere, or at least in software packages, and they do seem to be liked (Carswell, Frankenberger & Bernhard, 1991;Levy, Zacks, Tversky & Schiano, 1996). However, it is simply not clear if 3D displays improve performance, speed, accuracy or memory for data (Carswell et al, 1991;Spence & Lewandowsky, 1991;Levy et al, 1996). In some tasks, for example, memory, there is little difference between 3D and 2D displays; in other tasks, for example, estimation, there is a disadvantage to 3D displays (Zacks, Levy, Tversky & Schiano, 1998).…”