Comparing a friction-based uni-directional treadmill and a slip-style omni-directional treadmill on first-time HMD-VR user task performance, cybersickness, postural sway, posture angle, ease of use, enjoyment, and effort. - Afnan Bashir; Tamara De Regt; Christian M. Jones (Int. J. Hum. Comput. Stud., 2023)