Level roving is avoidable in localization tests when it would require excessive training

Evidence

The test design could have addressed the potential level-cue issue by applying level roving. However, this would have made the test more difficult to perform, because subjects would have been forced to ignore these added level differences when performing the test. Thus, level roving was rejected to avoid the much more extensive training required, cf. Moore et al. ( 1989 ). — Dijk, Pim van, Physiology, Psychoacoustics and…, 3131