Fig. 8: Sample responses.
Responses for one participant for the four backgrounds for a single body orientation (here upright) and buoyancy condition (here wet). The figure in the visual display is a photograph of a manikin that provided realistic orientation cues. A product of two psychometric functions is plotted through the data in polar coordinates where the outer circle represents “probe interpreted as a ‘d’ 100% of the time” and the inner circle represents “probe interpreted as a ‘p’ 100% of the time”. The PU is defined as the midpoint between the PSEs (50% points) of the two psychometric functions, indicated by radial lines.
