Peak Velocity under uncertain load conditions is plotted against Peak Velocity under known load conditions. The actual load is greater than the expected load. Individual values represent the average of 11-40 movements by a subject with a given load and expectation. The dashed lines have slopes or 1.1, 1.0 and 0.9. The open symbols show the data from Table 2 of Jaric et al.
Solid lines are linear regressions through the origin.
Different symbols distinguish the three groups described above. A dashed line of unity slope through the origin defines the null-hypothesis. Solid lines show linear regressions through the origin for each of the three conditions. The null hypothesis is that expectation of load size has no effect on movement velocity. According to Jaric et al.